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/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:23:19,846 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:23:19,848 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:23:19,859 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 10:23:19,906 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 [2018-09-30 10:23:19,935 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:23:19,935 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:23:19,936 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:23:19,936 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:23:19,941 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:23:19,941 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:23:19,941 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:23:19,941 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:23:19,941 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:23:19,942 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:23:19,942 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:23:19,942 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:23:19,942 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:23:19,944 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:23:19,944 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:23:19,944 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:23:19,944 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:23:19,944 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:23:19,945 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:23:19,945 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:23:19,945 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:23:19,945 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:23:19,947 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:23:19,947 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:23:19,947 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:23:19,947 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:23:19,947 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:23:19,948 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:23:19,948 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:23:19,948 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:23:20,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:23:20,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:23:20,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:23:20,029 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:23:20,029 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:23:20,030 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-30 10:23:20,030 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-30 10:23:20,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:23:20,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:23:20,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:23:20,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:23:20,085 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:23:20,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:23:20,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:23:20,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:23:20,125 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:23:20,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... [2018-09-30 10:23:20,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:23:20,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:23:20,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:23:20,152 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:23:20,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:23:20,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:23:20,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:23:20,456 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:23:20,456 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:23:20 BoogieIcfgContainer [2018-09-30 10:23:20,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:23:20,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:23:20,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:23:20,461 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:23:20,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:23:20" (1/2) ... [2018-09-30 10:23:20,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e010c15 and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:23:20, skipping insertion in model container [2018-09-30 10:23:20,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:23:20" (2/2) ... [2018-09-30 10:23:20,465 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-30 10:23:20,475 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:23:20,484 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:23:20,536 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:23:20,537 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:23:20,538 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:23:20,538 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:23:20,538 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:23:20,538 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:23:20,538 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:23:20,539 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:23:20,539 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:23:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 10:23:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:23:20,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:20,562 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 10:23:20,564 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:20,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-30 10:23:20,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:20,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:20,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:20,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:20,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:20,785 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:23:20,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:23:20,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:23:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:23:20,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:23:20,803 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 10:23:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:20,961 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 10:23:20,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:23:20,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:23:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:20,995 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:23:20,995 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:23:21,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:23:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:23:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 10:23:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:23:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 10:23:21,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 10:23:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:21,061 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 10:23:21,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:23:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 10:23:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:23:21,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:21,062 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:23:21,062 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:21,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-30 10:23:21,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:21,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:21,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:21,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:21,123 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:23:21,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:23:21,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:23:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:23:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:23:21,125 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-30 10:23:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:21,197 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 10:23:21,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:23:21,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 10:23:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:21,198 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:23:21,198 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:23:21,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:23:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:23:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:23:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:23:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 10:23:21,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 10:23:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:21,204 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 10:23:21,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:23:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 10:23:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:23:21,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:21,205 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:23:21,205 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:21,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-30 10:23:21,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:21,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:21,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:21,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:21,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:21,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:21,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:21,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:21,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:21,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 10:23:21,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:23:21,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:23:21,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:23:21,893 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-30 10:23:22,382 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 10:23:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:22,548 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-30 10:23:22,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:23:22,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 10:23:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:22,550 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:23:22,550 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:23:22,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:23:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:23:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:23:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:23:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 10:23:22,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-30 10:23:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:22,559 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 10:23:22,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:23:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 10:23:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:23:22,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:22,560 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 10:23:22,561 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:22,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-30 10:23:22,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:22,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:22,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:22,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:22,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:22,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:22,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:22,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:22,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:22,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:22,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:23,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:23,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 10:23:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:23:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:23:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:23:23,266 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-30 10:23:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:23,649 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-30 10:23:23,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:23:23,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 10:23:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:23,652 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:23:23,652 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:23:23,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:23:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:23:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:23:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:23:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 10:23:23,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-30 10:23:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:23,659 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 10:23:23,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:23:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 10:23:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:23:23,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:23,660 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 10:23:23,660 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:23,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-30 10:23:23,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:23,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:23,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:23,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:23,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:23,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:23,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:23,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:23,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:23:23,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:23,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:23,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:23,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-30 10:23:23,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:23:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:23:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:23:23,939 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-30 10:23:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:24,097 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-30 10:23:24,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:23:24,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 10:23:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:24,098 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:23:24,098 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:23:24,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:23:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:23:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:23:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:23:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 10:23:24,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 10:23:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 10:23:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:23:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 10:23:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:23:24,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:24,106 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 10:23:24,106 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:24,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-30 10:23:24,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:24,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:24,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:24,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:24,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:24,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:24,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:24,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:24,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:24,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 10:23:24,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:23:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:23:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:23:24,379 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 10:23:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:24,571 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-30 10:23:24,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:23:24,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 10:23:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:24,572 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:23:24,572 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:23:24,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:23:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:23:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 10:23:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:23:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 10:23:24,580 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-30 10:23:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:24,580 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 10:23:24,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:23:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 10:23:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:23:24,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:24,582 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 10:23:24,582 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:24,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-30 10:23:24,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:24,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:24,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:24,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:24,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:24,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:24,798 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:24,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:23:24,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:24,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:25,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:25,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 10:23:25,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:23:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:23:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:23:25,069 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-30 10:23:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:25,260 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 10:23:25,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:23:25,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-30 10:23:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:25,262 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:23:25,262 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:23:25,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:23:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:23:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:23:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:23:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 10:23:25,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 10:23:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:25,273 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 10:23:25,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:23:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 10:23:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:23:25,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:25,274 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 10:23:25,275 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:25,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-30 10:23:25,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:25,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:25,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:25,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:25,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:25,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:25,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:25,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:25,487 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:23:25,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:25,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:25,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:25,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-30 10:23:25,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:23:25,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:23:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:23:25,686 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-30 10:23:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:25,877 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-30 10:23:25,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:23:25,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-30 10:23:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:25,878 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:23:25,878 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:23:25,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:23:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:23:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:23:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:23:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 10:23:25,885 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 10:23:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:25,885 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 10:23:25,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:23:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 10:23:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:23:25,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:25,886 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 10:23:25,887 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:25,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-30 10:23:25,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:25,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:25,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:25,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:25,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:26,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:26,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:26,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:26,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:26,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:26,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 10:23:26,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:23:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:23:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:23:26,341 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 10:23:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:26,536 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 10:23:26,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:23:26,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 10:23:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:26,539 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:23:26,539 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:23:26,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:23:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:23:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 10:23:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:23:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 10:23:26,549 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-30 10:23:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:26,550 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 10:23:26,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:23:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 10:23:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:23:26,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:26,551 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 10:23:26,552 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:26,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-30 10:23:26,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:26,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:26,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:26,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:26,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:26,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:26,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:26,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:26,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:26,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:26,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:23:27,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:27,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-30 10:23:27,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:23:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:23:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:23:27,239 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-30 10:23:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:27,790 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 10:23:27,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:23:27,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-30 10:23:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:27,791 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:23:27,791 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:23:27,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:23:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:23:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:23:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:23:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 10:23:27,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 10:23:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:27,798 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 10:23:27,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:23:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 10:23:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:23:27,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:27,800 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 10:23:27,800 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:27,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-30 10:23:27,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:27,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:27,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:27,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:27,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:28,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:28,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:28,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:28,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:23:28,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:28,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:28,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:28,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-30 10:23:28,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:23:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:23:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:23:28,619 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-30 10:23:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:28,852 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-30 10:23:28,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:23:28,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-30 10:23:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:28,853 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:23:28,853 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:23:28,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:23:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:23:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:23:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:23:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 10:23:28,861 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 10:23:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:28,861 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 10:23:28,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:23:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 10:23:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:23:28,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:28,863 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 10:23:28,863 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:28,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-30 10:23:28,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:28,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:28,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:28,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:29,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:29,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:29,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:29,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:29,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:29,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:29,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:29,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 10:23:29,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:23:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:23:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:23:29,176 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 10:23:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:29,389 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 10:23:29,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:23:29,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 10:23:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:29,392 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:23:29,392 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:23:29,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:23:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:23:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-30 10:23:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:23:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 10:23:29,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-30 10:23:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:29,400 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 10:23:29,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:23:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 10:23:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:23:29,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:29,401 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 10:23:29,401 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:29,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-30 10:23:29,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:29,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:29,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:29,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:29,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:29,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:29,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:23:29,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:29,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:30,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:30,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 10:23:30,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:23:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:23:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:23:30,260 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-30 10:23:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:30,656 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 10:23:30,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:23:30,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-30 10:23:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:30,657 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:23:30,657 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:23:30,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:23:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:23:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:23:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:23:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 10:23:30,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 10:23:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:30,665 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 10:23:30,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:23:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 10:23:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:23:30,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:30,667 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 10:23:30,667 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:30,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-30 10:23:30,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:30,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:30,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:30,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:30,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:31,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:31,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:31,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:31,678 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:23:31,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:31,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:31,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:31,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-30 10:23:31,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:23:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:23:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:23:31,918 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-30 10:23:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:32,340 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-30 10:23:32,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:23:32,340 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-30 10:23:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:32,341 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:23:32,341 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:23:32,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:23:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:23:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:23:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:23:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 10:23:32,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 10:23:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:32,349 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 10:23:32,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:23:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 10:23:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:23:32,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:32,350 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 10:23:32,351 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:32,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-30 10:23:32,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:32,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:32,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:32,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:32,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:32,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:32,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:32,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:32,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:32,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 10:23:32,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:23:32,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:23:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:23:32,620 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 10:23:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:32,821 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-30 10:23:32,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:23:32,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 10:23:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:32,823 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:23:32,823 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:23:32,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:23:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:23:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-30 10:23:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:23:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 10:23:32,839 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-30 10:23:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:32,840 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 10:23:32,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:23:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 10:23:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:23:32,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:32,841 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 10:23:32,841 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:32,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-30 10:23:32,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:32,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:32,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:32,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:33,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:33,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:33,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:33,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:33,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:33,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:23:34,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:34,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-30 10:23:34,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:23:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:23:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:23:34,481 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-30 10:23:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:34,755 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 10:23:34,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:23:34,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-30 10:23:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:34,756 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:23:34,756 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:23:34,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:23:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:23:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:23:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:23:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 10:23:34,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 10:23:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:34,764 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 10:23:34,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:23:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 10:23:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:23:34,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:34,765 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 10:23:34,766 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:34,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-30 10:23:34,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:34,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:34,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:34,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:34,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:35,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:35,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:35,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:35,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:23:35,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:35,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:35,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:35,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-30 10:23:35,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:23:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:23:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:23:35,756 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-30 10:23:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:35,999 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-30 10:23:35,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:23:36,000 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-30 10:23:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:36,000 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:23:36,001 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:23:36,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:23:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:23:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:23:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:23:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 10:23:36,009 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 10:23:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:36,009 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 10:23:36,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:23:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 10:23:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:23:36,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:36,010 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 10:23:36,011 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:36,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-30 10:23:36,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:36,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:36,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:36,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:36,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:36,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:36,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:36,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:36,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:36,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:36,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 10:23:36,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:23:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:23:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:23:36,533 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 10:23:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:36,823 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 10:23:36,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:23:36,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 10:23:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:36,825 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:23:36,825 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:23:36,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:23:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:23:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-30 10:23:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:23:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 10:23:36,834 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-30 10:23:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:36,834 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 10:23:36,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:23:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 10:23:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:23:36,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:36,835 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 10:23:36,835 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:36,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-30 10:23:36,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:36,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:36,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:36,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:36,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:37,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:37,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:37,784 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:37,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 10:23:37,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:37,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:38,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:38,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 10:23:38,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:23:38,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:23:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:23:38,543 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-30 10:23:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:38,808 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 10:23:38,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:23:38,809 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-30 10:23:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:38,809 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:23:38,809 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:23:38,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:23:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:23:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:23:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:23:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 10:23:38,819 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 10:23:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:38,819 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 10:23:38,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:23:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 10:23:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:23:38,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:38,820 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 10:23:38,820 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:38,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-30 10:23:38,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:38,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:38,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:38,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:38,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:39,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:39,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:39,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:39,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 10:23:39,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:39,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:40,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:40,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-30 10:23:40,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:23:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:23:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:23:40,256 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-30 10:23:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:40,778 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-30 10:23:40,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:23:40,778 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-30 10:23:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:40,779 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:23:40,779 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:23:40,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:23:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:23:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:23:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:23:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 10:23:40,786 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 10:23:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:40,787 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 10:23:40,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:23:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 10:23:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:23:40,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:40,788 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 10:23:40,788 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:40,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:40,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-30 10:23:40,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:40,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:40,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:40,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:40,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:41,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:41,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:41,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:41,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:41,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:41,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 10:23:41,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:23:41,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:23:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:23:41,163 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 10:23:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:41,474 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 10:23:41,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:23:41,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 10:23:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:41,475 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:23:41,476 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:23:41,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:23:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:23:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-30 10:23:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:23:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 10:23:41,485 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-30 10:23:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:41,486 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 10:23:41,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:23:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 10:23:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:23:41,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:41,487 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 10:23:41,487 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:41,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-30 10:23:41,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:41,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:41,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:41,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:41,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:41,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:41,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:41,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:41,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:41,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:41,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:23:42,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:42,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-30 10:23:42,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:23:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:23:42,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1575, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:23:42,397 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-30 10:23:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:42,871 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 10:23:42,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:23:42,871 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-30 10:23:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:42,872 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:23:42,872 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:23:42,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:23:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:23:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:23:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:23:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 10:23:42,879 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 10:23:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:42,879 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 10:23:42,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:23:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 10:23:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:23:42,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:42,880 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 10:23:42,880 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:42,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-30 10:23:42,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:42,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:42,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:42,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:42,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:44,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:44,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:44,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:44,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:23:44,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:44,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:44,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:44,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-30 10:23:44,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:23:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:23:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:23:44,763 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-30 10:23:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:45,150 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-30 10:23:45,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:23:45,150 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-30 10:23:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:45,151 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:23:45,151 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:23:45,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:23:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:23:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:23:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:23:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 10:23:45,158 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 10:23:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:45,158 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 10:23:45,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:23:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 10:23:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:23:45,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:45,159 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 10:23:45,159 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:45,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-30 10:23:45,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:45,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:45,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:45,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:45,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:45,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:45,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:45,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:45,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:45,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:45,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:45,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:45,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 10:23:45,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:23:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:23:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:23:45,857 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 10:23:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:46,207 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-30 10:23:46,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:23:46,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 10:23:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:46,209 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:23:46,209 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:23:46,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:23:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:23:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-30 10:23:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:23:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 10:23:46,218 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-30 10:23:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:46,218 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 10:23:46,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:23:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 10:23:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:23:46,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:46,219 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 10:23:46,219 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:46,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-30 10:23:46,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:46,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:46,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:46,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:46,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:46,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:46,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:46,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:46,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:23:46,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:46,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:47,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:47,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 10:23:47,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:23:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:23:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:23:47,382 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-30 10:23:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:48,087 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 10:23:48,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:23:48,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-30 10:23:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:48,094 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:23:48,095 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:23:48,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:23:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:23:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:23:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:23:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 10:23:48,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 10:23:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:48,105 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 10:23:48,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:23:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 10:23:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:23:48,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:48,106 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 10:23:48,106 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:48,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-30 10:23:48,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:48,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:48,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:48,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:48,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:48,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:48,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:48,758 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:48,834 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 10:23:48,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:48,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:49,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:49,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-30 10:23:49,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:23:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:23:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:23:49,391 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-30 10:23:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:49,875 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-30 10:23:49,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:23:49,875 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-30 10:23:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:49,877 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:23:49,877 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:23:49,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1312, Invalid=3658, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:23:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:23:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:23:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:23:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 10:23:49,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 10:23:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:49,886 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 10:23:49,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:23:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 10:23:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:23:49,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:49,887 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 10:23:49,888 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:49,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-30 10:23:49,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:49,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:49,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:49,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:49,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:50,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:50,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:50,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:50,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:50,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:50,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 10:23:50,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:23:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:23:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:23:50,360 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 10:23:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:50,966 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 10:23:50,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:23:50,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 10:23:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:50,968 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:23:50,968 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:23:50,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:23:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:23:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-30 10:23:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:23:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 10:23:50,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-30 10:23:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:50,979 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 10:23:50,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:23:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 10:23:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:23:50,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:50,980 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 10:23:50,980 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:50,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:50,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-30 10:23:50,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:50,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:50,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:50,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:50,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:51,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:51,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:51,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:51,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:51,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:51,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:23:52,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:52,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-30 10:23:52,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:23:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:23:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:23:52,979 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-30 10:23:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:53,499 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 10:23:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:23:53,499 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-30 10:23:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:53,500 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:23:53,500 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:23:53,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:23:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:23:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:23:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:23:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 10:23:53,509 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 10:23:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:53,510 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 10:23:53,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:23:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 10:23:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:23:53,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:53,510 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 10:23:53,511 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:53,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-30 10:23:53,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:53,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:53,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:53,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:53,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:54,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:54,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:54,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:54,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 10:23:54,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:54,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:54,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:54,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-30 10:23:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:23:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:23:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:23:54,956 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-30 10:23:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:55,470 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-30 10:23:55,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:23:55,471 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-30 10:23:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:55,472 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:23:55,472 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:23:55,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:23:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:23:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:23:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:23:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 10:23:55,482 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 10:23:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:55,483 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 10:23:55,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:23:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 10:23:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:23:55,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:55,483 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 10:23:55,484 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:55,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-30 10:23:55,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:55,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:55,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:55,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:55,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:56,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:56,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:56,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:56,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:56,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:56,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:56,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:56,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 10:23:56,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:23:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:23:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:23:56,627 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 10:23:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:57,153 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 10:23:57,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:23:57,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 10:23:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:57,154 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:23:57,155 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:23:57,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:23:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:23:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-30 10:23:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:23:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 10:23:57,166 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-30 10:23:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 10:23:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:23:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 10:23:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:23:57,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:57,168 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 10:23:57,168 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:57,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-30 10:23:57,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:57,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:57,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:57,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:57,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:23:57,972 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:58,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:23:58,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:58,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:58,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:58,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 10:23:58,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:23:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:23:58,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:23:58,965 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-30 10:23:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:59,505 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 10:23:59,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:23:59,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-30 10:23:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:59,506 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:23:59,506 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:23:59,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:23:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:23:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:23:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:23:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 10:23:59,514 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 10:23:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:59,514 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 10:23:59,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:23:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 10:23:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:23:59,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:59,515 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 10:23:59,515 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:59,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:59,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-30 10:23:59,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:59,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:59,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:59,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:59,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:00,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:00,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:00,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:00,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:24:00,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:00,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:01,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:01,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-30 10:24:01,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:24:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:24:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:24:01,423 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-30 10:24:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:02,201 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-30 10:24:02,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:24:02,202 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-30 10:24:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:02,202 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:24:02,202 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:24:02,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1956, Invalid=5526, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:24:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:24:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:24:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:24:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 10:24:02,215 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 10:24:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:02,215 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 10:24:02,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:24:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 10:24:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:24:02,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:02,216 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 10:24:02,216 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:02,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-30 10:24:02,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:02,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:02,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:02,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:02,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:02,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:02,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:02,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:02,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:02,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 10:24:02,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:24:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:24:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:24:02,785 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 10:24:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:03,233 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-30 10:24:03,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:24:03,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 10:24:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:03,234 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:24:03,234 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:24:03,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:24:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:24:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-30 10:24:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:24:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 10:24:03,248 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-30 10:24:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:03,249 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 10:24:03,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:24:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 10:24:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:24:03,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:03,250 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 10:24:03,250 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:03,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-30 10:24:03,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:03,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:03,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:03,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:03,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:04,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:04,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:04,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:04,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:04,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:04,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:24:05,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:05,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-30 10:24:05,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:24:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:24:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=3703, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:24:05,124 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-30 10:24:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:05,751 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 10:24:05,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:24:05,751 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-30 10:24:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:05,752 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:24:05,752 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:24:05,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:24:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:24:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:24:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:24:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 10:24:05,764 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 10:24:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:05,764 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 10:24:05,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:24:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 10:24:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:24:05,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:05,765 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 10:24:05,765 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:05,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-30 10:24:05,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:05,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:05,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:05,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:05,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:06,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:06,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:06,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:06,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:24:06,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:06,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:07,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:07,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-30 10:24:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:24:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:24:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:24:07,932 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-30 10:24:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:09,232 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-30 10:24:09,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:24:09,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-30 10:24:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:09,233 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:24:09,233 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:24:09,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:24:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:24:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:24:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:24:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 10:24:09,243 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 10:24:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:09,243 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 10:24:09,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:24:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 10:24:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:24:09,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:09,244 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 10:24:09,244 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:09,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-30 10:24:09,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:09,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:09,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:09,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:09,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:09,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:09,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:09,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:09,760 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:09,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:09,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:09,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:09,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 10:24:09,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:24:09,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:24:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:24:09,842 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 10:24:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:10,323 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 10:24:10,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:24:10,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 10:24:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:10,324 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:24:10,325 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:24:10,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:24:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:24:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-30 10:24:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:24:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 10:24:10,339 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-30 10:24:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:10,340 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 10:24:10,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:24:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 10:24:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:24:10,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:10,341 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 10:24:10,341 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:10,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:10,341 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-30 10:24:10,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:10,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:10,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:10,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:10,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:11,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:11,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:11,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:11,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 10:24:11,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:11,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:13,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:13,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 10:24:13,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:24:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:24:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:24:13,027 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-30 10:24:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:13,774 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 10:24:13,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:24:13,774 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-30 10:24:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:13,775 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:24:13,775 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:24:13,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:24:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:24:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:24:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:24:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 10:24:13,787 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 10:24:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:13,787 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 10:24:13,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:24:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 10:24:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:24:13,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:13,788 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 10:24:13,788 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:13,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-30 10:24:13,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:13,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:13,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:13,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:13,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:14,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:14,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:14,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:15,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 10:24:15,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:15,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:16,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:16,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-30 10:24:16,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:24:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:24:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:24:16,124 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-30 10:24:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:17,409 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-30 10:24:17,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:24:17,409 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-30 10:24:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:17,410 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:24:17,410 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:24:17,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2728, Invalid=7778, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:24:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:24:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:24:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:24:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 10:24:17,424 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 10:24:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:17,425 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 10:24:17,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:24:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 10:24:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:24:17,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:17,426 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 10:24:17,426 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:17,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-30 10:24:17,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:17,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:17,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:17,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:17,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:18,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:18,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:18,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:18,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:18,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:18,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 10:24:18,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:24:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:24:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:24:18,630 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 10:24:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:19,211 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 10:24:19,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:24:19,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 10:24:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:19,213 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:24:19,214 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:24:19,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:24:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:24:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-30 10:24:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:24:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 10:24:19,230 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-30 10:24:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:19,231 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 10:24:19,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:24:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 10:24:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:24:19,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:19,232 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 10:24:19,232 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:19,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:19,232 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-30 10:24:19,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:19,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:19,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:19,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:19,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:21,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:21,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:21,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:21,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:21,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:21,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:24:23,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:23,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-30 10:24:23,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:24:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:24:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1539, Invalid=5103, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:24:23,252 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-30 10:24:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:24,524 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 10:24:24,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:24:24,524 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-30 10:24:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:24,525 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:24:24,525 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:24:24,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:24:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:24:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:24:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:24:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 10:24:24,538 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 10:24:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:24,538 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 10:24:24,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:24:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 10:24:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:24:24,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:24,539 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 10:24:24,539 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:24,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-30 10:24:24,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:24,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:24,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:25,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:25,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:25,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:25,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:24:25,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:25,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:27,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:27,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-30 10:24:27,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:24:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:24:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:24:27,375 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-30 10:24:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:28,226 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-30 10:24:28,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:24:28,226 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-30 10:24:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:28,227 INFO L225 Difference]: With dead ends: 175 [2018-09-30 10:24:28,227 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:24:28,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:24:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:24:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:24:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:24:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 10:24:28,239 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 10:24:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:28,239 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 10:24:28,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:24:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 10:24:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:24:28,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:28,240 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 10:24:28,240 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:28,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-30 10:24:28,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:28,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:28,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:28,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:28,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:29,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:29,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:29,142 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:29,237 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:29,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:29,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:29,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:29,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 10:24:29,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:24:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:24:29,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:24:29,714 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 10:24:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:30,875 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-30 10:24:30,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:24:30,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 10:24:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:30,877 INFO L225 Difference]: With dead ends: 124 [2018-09-30 10:24:30,877 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:24:30,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:24:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:24:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-30 10:24:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:24:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 10:24:30,894 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-30 10:24:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:30,895 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 10:24:30,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:24:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 10:24:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:24:30,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:30,896 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 10:24:30,896 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:30,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-30 10:24:30,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:30,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:30,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:30,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:32,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:32,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:32,477 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:32,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:24:32,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:32,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:34,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:34,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-30 10:24:34,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:24:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:24:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:24:34,083 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-30 10:24:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:35,105 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-30 10:24:35,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:24:35,106 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-30 10:24:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:35,106 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:24:35,106 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:24:35,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 10:24:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:24:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:24:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:24:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 10:24:35,120 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 10:24:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:35,120 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 10:24:35,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:24:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 10:24:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:24:35,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:35,121 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 10:24:35,121 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:35,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-30 10:24:35,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:35,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:35,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:35,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:35,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:37,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:37,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:37,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:37,482 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 10:24:37,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:37,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:38,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:38,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-30 10:24:38,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:24:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:24:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:24:38,868 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-30 10:24:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:39,734 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-30 10:24:39,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:24:39,734 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-30 10:24:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:39,735 INFO L225 Difference]: With dead ends: 187 [2018-09-30 10:24:39,736 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:24:39,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3628, Invalid=10414, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 10:24:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:24:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:24:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:24:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 10:24:39,753 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 10:24:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:39,753 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 10:24:39,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:24:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 10:24:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:24:39,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:39,754 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 10:24:39,755 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:39,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:39,755 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-30 10:24:39,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:39,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:39,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:39,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:39,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:40,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:40,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:40,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:40,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:40,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:40,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 10:24:40,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:24:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:24:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:24:40,870 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 10:24:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:41,519 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 10:24:41,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:24:41,519 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 10:24:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:41,520 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:24:41,521 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:24:41,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:24:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:24:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-30 10:24:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:24:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 10:24:41,536 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-30 10:24:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:41,536 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 10:24:41,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:24:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 10:24:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:24:41,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:41,537 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 10:24:41,537 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:41,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-30 10:24:41,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:41,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:41,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:41,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:41,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:43,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:43,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:43,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:43,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:43,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:43,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:24:44,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:44,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-30 10:24:44,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:24:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:24:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2015, Invalid=6727, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:24:44,919 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-30 10:24:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:45,977 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-30 10:24:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:24:45,977 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-30 10:24:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:45,978 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:24:45,978 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:24:45,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 10:24:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:24:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:24:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:24:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 10:24:45,994 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 10:24:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:45,994 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 10:24:45,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:24:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 10:24:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:24:45,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:45,995 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 10:24:45,995 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:45,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-30 10:24:45,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:45,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:45,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:45,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:45,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:48,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:48,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:48,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:48,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-30 10:24:48,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:48,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:50,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:50,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-30 10:24:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:24:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:24:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:24:50,496 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-30 10:24:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:51,582 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-30 10:24:51,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:24:51,582 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-30 10:24:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:51,583 INFO L225 Difference]: With dead ends: 199 [2018-09-30 10:24:51,583 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:24:51,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 10:24:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:24:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:24:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:24:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 10:24:51,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 10:24:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:51,604 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 10:24:51,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:24:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 10:24:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:24:51,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:51,605 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 10:24:51,605 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:51,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-30 10:24:51,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:51,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:51,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:52,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:52,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:52,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:52,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:52,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:52,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:53,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:53,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 10:24:53,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:24:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:24:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:24:53,117 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 10:24:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:53,863 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 10:24:53,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:24:53,863 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 10:24:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:53,864 INFO L225 Difference]: With dead ends: 140 [2018-09-30 10:24:53,864 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 10:24:53,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:24:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 10:24:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-30 10:24:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:24:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 10:24:53,882 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-30 10:24:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:53,882 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 10:24:53,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:24:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 10:24:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:24:53,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:53,883 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 10:24:53,883 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:53,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:53,883 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-30 10:24:53,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:53,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:53,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:53,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:53,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:55,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:55,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:24:55,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:55,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:24:55,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:55,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:58,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:58,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-30 10:24:58,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:24:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:24:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:24:58,138 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-30 10:24:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:59,292 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-30 10:24:59,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:24:59,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-30 10:24:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:59,293 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:24:59,293 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:24:59,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 10:24:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:24:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:24:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:24:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 10:24:59,309 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 10:24:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:59,309 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 10:24:59,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:24:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 10:24:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:24:59,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:59,309 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 10:24:59,310 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:59,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:59,310 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-30 10:24:59,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:59,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:59,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:59,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:59,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:01,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:01,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:01,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:01,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:25:01,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:01,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:03,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:03,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-30 10:25:03,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:25:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:25:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:25:03,729 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-30 10:25:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:04,905 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-30 10:25:04,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:25:04,905 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-30 10:25:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:04,906 INFO L225 Difference]: With dead ends: 211 [2018-09-30 10:25:04,906 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:25:04,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4656, Invalid=13434, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 10:25:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:25:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:25:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:25:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 10:25:04,927 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 10:25:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:04,927 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 10:25:04,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:25:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 10:25:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:25:04,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:04,928 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 10:25:04,928 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:04,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-30 10:25:04,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:04,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:04,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:04,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:04,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:05,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:05,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:05,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:06,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:06,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:06,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 10:25:06,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:25:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:25:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:25:06,195 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 10:25:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:06,953 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-30 10:25:06,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:25:06,953 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 10:25:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:06,954 INFO L225 Difference]: With dead ends: 148 [2018-09-30 10:25:06,954 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 10:25:06,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:25:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 10:25:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-30 10:25:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:25:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 10:25:06,976 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-30 10:25:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:06,977 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 10:25:06,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:25:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 10:25:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:25:06,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:06,978 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 10:25:06,978 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:06,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-30 10:25:06,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:06,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:06,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:06,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:06,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:08,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:08,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:08,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:25:08,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:25:08,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:08,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:25:12,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:12,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-30 10:25:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:25:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:25:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=8575, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:25:12,170 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-30 10:25:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:13,711 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-30 10:25:13,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:25:13,711 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-30 10:25:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:13,712 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:25:13,712 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:25:13,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 10:25:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:25:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:25:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:25:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 10:25:13,728 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 10:25:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:13,728 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 10:25:13,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:25:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 10:25:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:25:13,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:13,729 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 10:25:13,729 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:13,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-30 10:25:13,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:13,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:13,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:13,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:13,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:15,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:15,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:15,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:25:15,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:25:15,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:15,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:17,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:17,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-30 10:25:17,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:25:17,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:25:17,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:25:17,562 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-30 10:25:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:19,060 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-30 10:25:19,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:25:19,060 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-30 10:25:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:19,061 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:25:19,061 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:25:19,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 10:25:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:25:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:25:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:25:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 10:25:19,078 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 10:25:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:19,078 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 10:25:19,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:25:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 10:25:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:25:19,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:19,079 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 10:25:19,079 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:19,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-30 10:25:19,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:19,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:19,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:19,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:19,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:19,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:19,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:19,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:25:19,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:25:19,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:19,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:20,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:20,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 10:25:20,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:25:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:25:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:25:20,037 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 10:25:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:20,853 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 10:25:20,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:25:20,853 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 10:25:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:20,854 INFO L225 Difference]: With dead ends: 156 [2018-09-30 10:25:20,854 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 10:25:20,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:25:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 10:25:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-30 10:25:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 10:25:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 10:25:20,872 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-30 10:25:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:20,873 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 10:25:20,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:25:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 10:25:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:25:20,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:20,874 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 10:25:20,874 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:20,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:20,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-30 10:25:20,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:20,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:20,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:20,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:20,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:22,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:22,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:22,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:25:22,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-30 10:25:22,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:22,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:25,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:25,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-30 10:25:25,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:25:25,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:25:25,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:25:25,090 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-30 10:25:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:26,475 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-30 10:25:26,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:25:26,476 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-30 10:25:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:26,477 INFO L225 Difference]: With dead ends: 233 [2018-09-30 10:25:26,477 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:25:26,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 10:25:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:25:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:25:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:25:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 10:25:26,497 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 10:25:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:26,497 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 10:25:26,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:25:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 10:25:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 10:25:26,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:26,499 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 10:25:26,499 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:26,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-30 10:25:26,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:26,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:26,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:26,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:26,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:28,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:28,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:28,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:28,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 10:25:28,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:28,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:30,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:30,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-30 10:25:30,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:25:30,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:25:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:25:30,829 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-30 10:25:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:32,171 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-30 10:25:32,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:25:32,171 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-30 10:25:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:32,172 INFO L225 Difference]: With dead ends: 235 [2018-09-30 10:25:32,172 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:25:32,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5812, Invalid=16838, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 10:25:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:25:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:25:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:25:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 10:25:32,191 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 10:25:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:32,191 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 10:25:32,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:25:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 10:25:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 10:25:32,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:32,192 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 10:25:32,192 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:32,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-30 10:25:32,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:32,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:32,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:32,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:32,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:33,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:33,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:33,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:33,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:33,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:33,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 10:25:33,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:25:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:25:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:25:33,302 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 10:25:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:34,156 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 10:25:34,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:25:34,157 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 10:25:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:34,158 INFO L225 Difference]: With dead ends: 164 [2018-09-30 10:25:34,158 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 10:25:34,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:25:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 10:25:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-30 10:25:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 10:25:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 10:25:34,186 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-30 10:25:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:34,186 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 10:25:34,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:25:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 10:25:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 10:25:34,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:34,187 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 10:25:34,187 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:34,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-30 10:25:34,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:34,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:34,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:34,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:34,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:36,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:36,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:36,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:25:36,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:25:36,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:36,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:25:38,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:38,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-30 10:25:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 10:25:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 10:25:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3159, Invalid=10647, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 10:25:38,777 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-30 10:25:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:40,375 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-30 10:25:40,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:25:40,375 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-30 10:25:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:40,376 INFO L225 Difference]: With dead ends: 245 [2018-09-30 10:25:40,376 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:25:40,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 10:25:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:25:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:25:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:25:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 10:25:40,396 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 10:25:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:40,396 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 10:25:40,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 10:25:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 10:25:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 10:25:40,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:40,397 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 10:25:40,397 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:40,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-30 10:25:40,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:40,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:40,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:40,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:40,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:42,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:42,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:42,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:25:42,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:25:42,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:42,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:45,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:45,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-30 10:25:45,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 10:25:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 10:25:45,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 10:25:45,122 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-30 10:25:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:46,740 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-30 10:25:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:25:46,740 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-30 10:25:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:46,740 INFO L225 Difference]: With dead ends: 247 [2018-09-30 10:25:46,741 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 10:25:46,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 10:25:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 10:25:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 10:25:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 10:25:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 10:25:46,761 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 10:25:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 10:25:46,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 10:25:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 10:25:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:25:46,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:46,762 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 10:25:46,762 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:46,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-30 10:25:46,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:46,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:46,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:47,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:47,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:47,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:25:47,763 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:25:47,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:47,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:47,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:47,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 10:25:47,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:25:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:25:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:25:47,873 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 10:25:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:48,983 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-30 10:25:48,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:25:48,984 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 10:25:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:48,985 INFO L225 Difference]: With dead ends: 172 [2018-09-30 10:25:48,985 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 10:25:48,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:25:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 10:25:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-30 10:25:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:25:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 10:25:49,007 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-30 10:25:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:49,008 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 10:25:49,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:25:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 10:25:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 10:25:49,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:49,009 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 10:25:49,009 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:49,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-30 10:25:49,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:49,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:49,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:49,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:51,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:51,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:51,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:25:51,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:25:51,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:51,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:54,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:54,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-30 10:25:54,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:25:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:25:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 10:25:54,316 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-30 10:25:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:56,057 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-30 10:25:56,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:25:56,057 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-30 10:25:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:56,058 INFO L225 Difference]: With dead ends: 257 [2018-09-30 10:25:56,058 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:25:56,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6888, Invalid=20172, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 10:25:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:25:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 10:25:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 10:25:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 10:25:56,080 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 10:25:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:56,081 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 10:25:56,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:25:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 10:25:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:25:56,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:56,081 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 10:25:56,082 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:56,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-30 10:25:56,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:56,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:56,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:56,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:56,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:59,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:59,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:59,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:59,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-30 10:25:59,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:59,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:02,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:02,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-30 10:26:02,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 10:26:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 10:26:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 10:26:02,126 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-30 10:26:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:04,162 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-30 10:26:04,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:26:04,162 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-30 10:26:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:04,163 INFO L225 Difference]: With dead ends: 259 [2018-09-30 10:26:04,164 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:26:04,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7096, Invalid=20626, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 10:26:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:26:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:26:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:26:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 10:26:04,194 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 10:26:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:04,194 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 10:26:04,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 10:26:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 10:26:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 10:26:04,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:04,195 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 10:26:04,195 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:04,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-30 10:26:04,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:04,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:04,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:05,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:05,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:05,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:05,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:05,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:05,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 10:26:05,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:26:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:26:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:26:05,448 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 10:26:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:06,478 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 10:26:06,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:26:06,478 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 10:26:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:06,480 INFO L225 Difference]: With dead ends: 180 [2018-09-30 10:26:06,480 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 10:26:06,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:26:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 10:26:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-30 10:26:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 10:26:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 10:26:06,512 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-30 10:26:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:06,512 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 10:26:06,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:26:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 10:26:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:26:06,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:06,513 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 10:26:06,513 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:06,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-30 10:26:06,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:06,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:06,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:06,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:06,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:08,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:08,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:08,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:26:09,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:26:09,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:09,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:26:11,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:11,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-30 10:26:11,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 10:26:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 10:26:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3827, Invalid=12943, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 10:26:11,966 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-30 10:26:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:13,829 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-30 10:26:13,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:26:13,829 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-30 10:26:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:13,830 INFO L225 Difference]: With dead ends: 269 [2018-09-30 10:26:13,830 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:26:13,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6153 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 10:26:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:26:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 10:26:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 10:26:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 10:26:13,852 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 10:26:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:13,853 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 10:26:13,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 10:26:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 10:26:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 10:26:13,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:13,854 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 10:26:13,854 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:13,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-30 10:26:13,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:13,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:13,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:13,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:13,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:16,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:16,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:16,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:26:16,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-30 10:26:16,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:16,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:19,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:19,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-30 10:26:19,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 10:26:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 10:26:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 10:26:19,897 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-30 10:26:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:21,603 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-30 10:26:21,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:26:21,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-30 10:26:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:21,604 INFO L225 Difference]: With dead ends: 271 [2018-09-30 10:26:21,604 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:26:21,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6323 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 10:26:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:26:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:26:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:26:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 10:26:21,627 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 10:26:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:21,627 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 10:26:21,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 10:26:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 10:26:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 10:26:21,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:21,628 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 10:26:21,629 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:21,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-30 10:26:21,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:21,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:21,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:21,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:21,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:22,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:22,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:22,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:26:22,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:26:22,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:22,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:22,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:22,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 10:26:22,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:26:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:26:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:26:22,822 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 10:26:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:23,912 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 10:26:23,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:26:23,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 10:26:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:23,914 INFO L225 Difference]: With dead ends: 188 [2018-09-30 10:26:23,914 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 10:26:23,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:26:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 10:26:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-30 10:26:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:26:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 10:26:23,940 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-30 10:26:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:23,940 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 10:26:23,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:26:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 10:26:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 10:26:23,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:23,941 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 10:26:23,941 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:23,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-30 10:26:23,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:23,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:23,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:23,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:23,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:26,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:26,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:26,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:26:26,978 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:26:26,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:26,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:30,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:30,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-30 10:26:30,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 10:26:30,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 10:26:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4276, Invalid=14356, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 10:26:30,343 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-30 10:26:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:32,125 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-30 10:26:32,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:26:32,125 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-30 10:26:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:32,126 INFO L225 Difference]: With dead ends: 281 [2018-09-30 10:26:32,126 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:26:32,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-30 10:26:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:26:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:26:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:26:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 10:26:32,162 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 10:26:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:32,162 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 10:26:32,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 10:26:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 10:26:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 10:26:32,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:32,163 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 10:26:32,164 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:32,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-30 10:26:32,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:32,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:32,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:32,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:32,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:35,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:35,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:35,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:26:35,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:26:35,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:35,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:38,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:38,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-30 10:26:38,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 10:26:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 10:26:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 10:26:38,475 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-30 10:26:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:40,842 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-30 10:26:40,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:26:40,842 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-30 10:26:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:40,843 INFO L225 Difference]: With dead ends: 283 [2018-09-30 10:26:40,843 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 10:26:40,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8508, Invalid=24798, Unknown=0, NotChecked=0, Total=33306 [2018-09-30 10:26:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 10:26:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 10:26:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 10:26:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 10:26:40,879 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 10:26:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:40,879 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 10:26:40,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 10:26:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 10:26:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:26:40,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:40,881 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 10:26:40,881 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:40,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-30 10:26:40,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:40,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:40,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:40,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:40,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:42,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:42,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:42,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:42,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:42,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:42,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 10:26:42,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:26:42,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:26:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:26:42,304 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 10:26:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:43,446 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-30 10:26:43,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:26:43,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 10:26:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:43,447 INFO L225 Difference]: With dead ends: 196 [2018-09-30 10:26:43,447 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 10:26:43,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:26:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 10:26:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-30 10:26:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:26:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 10:26:43,474 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-30 10:26:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:43,474 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 10:26:43,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:26:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 10:26:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 10:26:43,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:43,475 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 10:26:43,475 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:43,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:43,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-30 10:26:43,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:43,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:43,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:43,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:43,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:46,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:46,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:46,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:26:46,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:26:46,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:46,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:26:50,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:50,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-30 10:26:50,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 10:26:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 10:26:50,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4559, Invalid=15463, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 10:26:50,296 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-30 10:26:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:52,481 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-30 10:26:52,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:26:52,481 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-30 10:26:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:52,482 INFO L225 Difference]: With dead ends: 293 [2018-09-30 10:26:52,482 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:26:52,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7383 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 10:26:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:26:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 10:26:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 10:26:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 10:26:52,510 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 10:26:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:52,510 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 10:26:52,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 10:26:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 10:26:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:26:52,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:52,511 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 10:26:52,511 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:52,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:52,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-30 10:26:52,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:52,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:52,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:52,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:52,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:55,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:55,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:26:55,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:26:55,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:26:55,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:55,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:59,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:59,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-30 10:26:59,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 10:26:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 10:26:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 10:26:59,195 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-30 10:27:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:27:01,635 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-30 10:27:01,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:27:01,635 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-30 10:27:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:27:01,636 INFO L225 Difference]: With dead ends: 295 [2018-09-30 10:27:01,636 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 10:27:01,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9262, Invalid=27028, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 10:27:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 10:27:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 10:27:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 10:27:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 10:27:01,664 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 10:27:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:27:01,665 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 10:27:01,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 10:27:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 10:27:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 10:27:01,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:27:01,666 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 10:27:01,666 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:27:01,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:27:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-30 10:27:01,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:27:01,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:27:01,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:01,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:27:01,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:27:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:27:02,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:27:02,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:27:02,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:27:03,004 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:27:03,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:27:03,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:27:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:27:03,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:27:03,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 10:27:03,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:27:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:27:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:27:03,116 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 10:27:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:27:04,356 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-30 10:27:04,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:27:04,356 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 10:27:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:27:04,357 INFO L225 Difference]: With dead ends: 204 [2018-09-30 10:27:04,358 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 10:27:04,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:27:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 10:27:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-30 10:27:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 10:27:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 10:27:04,387 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-30 10:27:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:27:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 10:27:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:27:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 10:27:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:27:04,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:27:04,388 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 10:27:04,389 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:27:04,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:27:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-30 10:27:04,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:27:04,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:27:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:04,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:27:04,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:27:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:27:07,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:27:07,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:27:07,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:27:07,867 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-30 10:27:07,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:27:07,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:27:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:27:11,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:27:11,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-09-30 10:27:11,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 10:27:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 10:27:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5048, Invalid=17004, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 10:27:11,887 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-09-30 10:27:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:27:14,230 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-09-30 10:27:14,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:27:14,230 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-09-30 10:27:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:27:14,231 INFO L225 Difference]: With dead ends: 305 [2018-09-30 10:27:14,231 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:27:14,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 10:27:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:27:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:27:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:27:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-30 10:27:14,271 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-30 10:27:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:27:14,271 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-30 10:27:14,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 10:27:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-30 10:27:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 10:27:14,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:27:14,273 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-30 10:27:14,273 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:27:14,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:27:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-09-30 10:27:14,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:27:14,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:27:14,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:14,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:27:14,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:27:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:27:14,459 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:27:14,463 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:27:14,463 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:27:14 BoogieIcfgContainer [2018-09-30 10:27:14,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:27:14,464 INFO L168 Benchmark]: Toolchain (without parser) took 234382.32 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 446.7 MB). Free memory was 1.5 GB in the beginning and 852.3 MB in the end (delta: 606.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-30 10:27:14,465 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:27:14,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.95 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. [2018-09-30 10:27:14,465 INFO L168 Benchmark]: Boogie Preprocessor took 25.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:27:14,466 INFO L168 Benchmark]: RCFGBuilder took 305.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:27:14,466 INFO L168 Benchmark]: TraceAbstraction took 234005.59 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 446.7 MB). Free memory was 1.4 GB in the beginning and 852.3 MB in the end (delta: 585.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-09-30 10:27:14,469 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 0.18 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 39.95 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. * Boogie Preprocessor took 25.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 305.53 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 234005.59 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 446.7 MB). Free memory was 1.4 GB in the beginning and 852.3 MB in the end (delta: 585.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was analyzing trace of length 203 with TraceHistMax 50, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 3 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 233.9s OverallTime, 74 OverallIterations, 50 TraceHistogramMax, 64.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2093 SDtfs, 1795 SDslu, 26489 SDs, 0 SdLazy, 27395 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13008 GetRequests, 6886 SyntacticMatches, 0 SemanticMatches, 6122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152951 ImplicationChecksByTransitivity, 186.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 73 MinimizatonAttempts, 24 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 155.2s InterpolantComputationTime, 15058 NumberOfCodeBlocks, 15058 NumberOfCodeBlocksAsserted, 1067 NumberOfCheckSat, 14914 ConstructedInterpolants, 0 QuantifiedInterpolants, 7837611 SizeOfPredicates, 213 NumberOfNonLiveVariables, 40803 ConjunctsInSsa, 3890 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 121274/237670 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-27-14-478.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-27-14-478.csv Completed graceful shutdown