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 0.1.23-4eac566 [2018-09-23 19:39:42,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:39:42,867 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:39:42,882 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-23 19:39:42,924 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:39:42,954 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:39:42,955 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:39:42,956 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:39:42,956 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:39:42,959 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:39:42,959 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:39:42,960 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:39:42,960 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:39:42,961 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:39:42,961 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:39:42,961 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:39:42,961 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:39:42,961 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:39:42,962 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:39:42,962 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:39:42,962 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:39:42,962 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:39:42,964 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:39:42,964 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:39:42,964 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:39:42,964 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:39:42,964 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:39:42,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:39:42,965 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:39:42,965 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:39:42,965 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:39:42,966 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:39:42,966 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:39:42,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:39:42,966 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:39:43,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:39:43,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:39:43,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:39:43,062 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:39:43,063 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:39:43,064 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-23 19:39:43,064 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-23 19:39:43,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:39:43,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:39:43,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:43,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:39:43,148 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:39:43,171 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,184 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:39:43,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:39:43,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:39:43,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:39:43,206 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,206 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,207 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,208 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,211 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,215 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,216 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 23.09 07:39:43" (1/1) ... [2018-09-23 19:39:43,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:39:43,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:39:43,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:39:43,219 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:39:43,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:39:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:39:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:39:43,526 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:39:43,526 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:39:43 BoogieIcfgContainer [2018-09-23 19:39:43,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:39:43,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:39:43,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:39:43,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:39:43,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:39:43" (1/2) ... [2018-09-23 19:39:43,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f01a8eb and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:39:43, skipping insertion in model container [2018-09-23 19:39:43,533 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 23.09 07:39:43" (2/2) ... [2018-09-23 19:39:43,534 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-23 19:39:43,545 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:39:43,554 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:39:43,606 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:39:43,607 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:39:43,607 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:39:43,607 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:39:43,607 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:39:43,607 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:39:43,608 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:39:43,608 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:39:43,608 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:39:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 19:39:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:39:43,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:43,632 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:39:43,633 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:43,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-23 19:39:43,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:43,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:43,839 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:39:43,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:39:43,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:39:43,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:39:43,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:43,858 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-23 19:39:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:44,078 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-23 19:39:44,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:39:44,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:39:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:44,092 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:39:44,092 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:39:44,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:39:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:39:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-23 19:39:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:39:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 19:39:44,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-23 19:39:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:44,129 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 19:39:44,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:39:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 19:39:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:39:44,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:44,130 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:39:44,130 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:44,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-23 19:39:44,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:44,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:44,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:44,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,193 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:39:44,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:39:44,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:39:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:39:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:39:44,196 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-23 19:39:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:44,282 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-23 19:39:44,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:39:44,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 19:39:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:44,283 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:39:44,283 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:39:44,284 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 [2018-09-23 19:39:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:39:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:39:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:39:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 19:39:44,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-23 19:39:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:44,289 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 19:39:44,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:39:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 19:39:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:39:44,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:44,290 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:39:44,290 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:44,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:44,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-23 19:39:44,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:44,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:44,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:44,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:44,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:44,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:44,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:44,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:45,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:45,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-23 19:39:45,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:39:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:39:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:39:45,068 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-23 19:39:45,595 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-23 19:39:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:45,685 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-23 19:39:45,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:39:45,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-23 19:39:45,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:45,686 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:39:45,686 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:39:45,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:39:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:39:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:39:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 19:39:45,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-23 19:39:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:45,694 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 19:39:45,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:39:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 19:39:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:39:45,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:45,696 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 19:39:45,696 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:45,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-23 19:39:45,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:45,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:45,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:45,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:45,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:45,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:45,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:45,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:45,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:46,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 19:39:46,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:39:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:39:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:46,401 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-23 19:39:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:46,766 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-23 19:39:46,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:39:46,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-23 19:39:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:46,773 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:39:46,773 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:39:46,774 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 [2018-09-23 19:39:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:39:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:39:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:39:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 19:39:46,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-23 19:39:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:46,780 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 19:39:46,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:39:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 19:39:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:39:46,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:46,781 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 19:39:46,782 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:46,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-23 19:39:46,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:46,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:46,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:46,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:46,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:46,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:46,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:46,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:39:46,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:47,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:47,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-23 19:39:47,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:39:47,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:39:47,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:47,131 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-23 19:39:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:47,308 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-23 19:39:47,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:39:47,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-23 19:39:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:47,310 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:39:47,310 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:39:47,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:39:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:39:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:39:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 19:39:47,320 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-23 19:39:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:47,320 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 19:39:47,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:39:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 19:39:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:39:47,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:47,321 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-23 19:39:47,322 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:47,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-23 19:39:47,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:47,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:47,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:47,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:47,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:47,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:47,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:47,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:47,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:47,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:47,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:47,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-23 19:39:47,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:39:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:39:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:39:47,693 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-23 19:39:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:47,842 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-23 19:39:47,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:39:47,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-23 19:39:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:47,845 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:39:47,845 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:39:47,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:39:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:39:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-23 19:39:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:39:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 19:39:47,854 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-23 19:39:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:47,855 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 19:39:47,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:39:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 19:39:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:39:47,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:47,856 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-23 19:39:47,856 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:47,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-23 19:39:47,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:47,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:48,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:48,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:48,068 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:39:48,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:48,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:48,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-23 19:39:48,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:39:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:39:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:39:48,231 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-23 19:39:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,390 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-23 19:39:48,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:39:48,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-23 19:39:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,392 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:39:48,393 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:39:48,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:39:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:39:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:39:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:39:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 19:39:48,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-23 19:39:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:48,401 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 19:39:48,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:39:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 19:39:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:39:48,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:48,403 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 19:39:48,403 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:48,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-23 19:39:48,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:48,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:48,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:48,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:48,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:48,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:48,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:39:48,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:48,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:48,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:48,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-23 19:39:48,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:39:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:39:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:39:48,744 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-23 19:39:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,955 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-23 19:39:48,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:39:48,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-23 19:39:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,956 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:39:48,956 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:39:48,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:39:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:39:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:39:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:39:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 19:39:48,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-23 19:39:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:48,964 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 19:39:48,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:39:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 19:39:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:39:48,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:48,965 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-23 19:39:48,965 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:48,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-23 19:39:48,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:48,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:48,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:49,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:49,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:49,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:49,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-23 19:39:49,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:39:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:39:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:39:49,449 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-23 19:39:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:49,661 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-23 19:39:49,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:39:49,663 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-23 19:39:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:49,664 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:39:49,664 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:39:49,665 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 [2018-09-23 19:39:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:39:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-23 19:39:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:39:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 19:39:49,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-23 19:39:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:49,673 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 19:39:49,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:39:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 19:39:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:39:49,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:49,674 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-23 19:39:49,674 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:49,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-23 19:39:49,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:49,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:49,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:49,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:49,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:49,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:49,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:49,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:49,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:49,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:39:50,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:50,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-23 19:39:50,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:39:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:39:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:39:50,428 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-23 19:39:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:50,966 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-23 19:39:50,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:39:50,966 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-23 19:39:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:50,967 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:39:50,967 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:39:50,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:39:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:39:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:39:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:39:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 19:39:50,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-23 19:39:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:50,975 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 19:39:50,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:39:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 19:39:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:39:50,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:50,976 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 19:39:50,976 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:50,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-23 19:39:50,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:50,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:50,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:50,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:50,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:51,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:51,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:51,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:51,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:39:51,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:51,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:51,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:51,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-23 19:39:51,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:39:51,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:39:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:39:51,860 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-23 19:39:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:52,204 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-23 19:39:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:39:52,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-23 19:39:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:52,205 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:39:52,205 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:39:52,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:39:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:39:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:39:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:39:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 19:39:52,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-23 19:39:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:52,213 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 19:39:52,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:39:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 19:39:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:39:52,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:52,214 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-23 19:39:52,214 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:52,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:52,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-23 19:39:52,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:52,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:52,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:52,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:52,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:52,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:52,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:52,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:52,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:52,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:52,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:52,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:52,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-23 19:39:52,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:39:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:39:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:39:52,550 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-23 19:39:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:52,720 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 19:39:52,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:39:52,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-23 19:39:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:52,722 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:39:52,722 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:39:52,723 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 [2018-09-23 19:39:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:39:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-23 19:39:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:39:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 19:39:52,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-23 19:39:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:52,730 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 19:39:52,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:39:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 19:39:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:39:52,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:52,731 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-23 19:39:52,731 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:52,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-23 19:39:52,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:52,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:52,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:52,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:53,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:53,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:53,167 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:53,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:39:53,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:53,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:53,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:53,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-23 19:39:53,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:39:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:39:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:39:53,469 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-23 19:39:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:53,840 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-23 19:39:53,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:39:53,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-23 19:39:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:53,842 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:39:53,842 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:39:53,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:39:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:39:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:39:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:39:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 19:39:53,851 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-23 19:39:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:53,851 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 19:39:53,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:39:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 19:39:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:39:53,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:53,852 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 19:39:53,852 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:53,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-23 19:39:53,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:53,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:53,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:53,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:54,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:54,184 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:54,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:39:54,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:54,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:54,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:54,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-23 19:39:54,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:39:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:39:54,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:39:54,512 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-23 19:39:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:54,917 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-23 19:39:54,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:39:54,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-23 19:39:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:54,918 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:39:54,919 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:39:54,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:39:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:39:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:39:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:39:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 19:39:54,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-23 19:39:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:54,927 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 19:39:54,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:39:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 19:39:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:39:54,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:54,928 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-23 19:39:54,928 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:54,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-23 19:39:54,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:54,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:54,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:54,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:54,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:55,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:55,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:56,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:56,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:56,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:56,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-23 19:39:56,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:39:56,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:39:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:39:56,110 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-23 19:39:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:56,325 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-23 19:39:56,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:39:56,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 19:39:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:56,327 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:39:56,327 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:39:56,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:39:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:39:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-23 19:39:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:39:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 19:39:56,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-23 19:39:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:56,338 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 19:39:56,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:39:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 19:39:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:39:56,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:56,339 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-23 19:39:56,340 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:56,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:56,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-23 19:39:56,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:56,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:56,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:56,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:57,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:57,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:57,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:57,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:57,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:57,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:39:58,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:58,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-23 19:39:58,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:39:58,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:39:58,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:39:58,293 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-23 19:39:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:58,488 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-23 19:39:58,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:39:58,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-23 19:39:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:58,489 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:39:58,490 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:39:58,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:39:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:39:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:39:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:39:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 19:39:58,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-23 19:39:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:58,502 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 19:39:58,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:39:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 19:39:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:39:58,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:58,503 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 19:39:58,503 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:58,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-23 19:39:58,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:58,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:58,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:58,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:58,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:39:59,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:59,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:59,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:59,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:39:59,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:59,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:00,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-23 19:40:00,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:40:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:40:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:40:00,052 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-23 19:40:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:00,294 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-23 19:40:00,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:40:00,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-23 19:40:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:00,295 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:40:00,295 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:40:00,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:40:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:40:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:40:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:40:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 19:40:00,306 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-23 19:40:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:00,306 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 19:40:00,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:40:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 19:40:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:40:00,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:00,307 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-23 19:40:00,307 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:00,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-23 19:40:00,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:00,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:00,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:00,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:00,584 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:00,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:00,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:00,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:00,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-23 19:40:00,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:40:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:40:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:40:00,652 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-23 19:40:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:00,950 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-23 19:40:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:40:00,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-23 19:40:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:00,951 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:40:00,951 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:40:00,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:40:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:40:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-23 19:40:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:40:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 19:40:00,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-23 19:40:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:00,961 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 19:40:00,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:40:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 19:40:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:40:00,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:00,962 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-23 19:40:00,962 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:00,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-23 19:40:00,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:00,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:00,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:00,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:01,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:01,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:01,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:01,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-23 19:40:01,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:01,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:02,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:02,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-23 19:40:02,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:40:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:40:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:40:02,488 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-23 19:40:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:02,767 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-23 19:40:02,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:40:02,768 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-23 19:40:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:02,768 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:40:02,768 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:40:02,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:40:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:40:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:40:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:40:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 19:40:02,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-23 19:40:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:02,778 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 19:40:02,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:40:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 19:40:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:40:02,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:02,779 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 19:40:02,780 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:02,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-23 19:40:02,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:02,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:03,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:03,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:03,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:03,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:40:03,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:03,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:04,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:04,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-23 19:40:04,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:40:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:40:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:40:04,301 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-23 19:40:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:04,582 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-23 19:40:04,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:40:04,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-23 19:40:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:04,583 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:40:04,583 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:40:04,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:40:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:40:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:40:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:40:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 19:40:04,591 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-23 19:40:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:04,591 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 19:40:04,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:40:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 19:40:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:40:04,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:04,592 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-23 19:40:04,593 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:04,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-23 19:40:04,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:04,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:04,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:04,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:04,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:05,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:05,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:05,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:05,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-23 19:40:05,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:40:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:40:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:40:05,170 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-23 19:40:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:05,463 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 19:40:05,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:40:05,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-23 19:40:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:05,465 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:40:05,465 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:40:05,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:40:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:40:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-23 19:40:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:40:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 19:40:05,474 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-23 19:40:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:05,474 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 19:40:05,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:40:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 19:40:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:40:05,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:05,475 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-23 19:40:05,476 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:05,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-23 19:40:05,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:05,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:05,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:05,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:05,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:05,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:05,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:05,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:05,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:05,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:40:06,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:06,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-23 19:40:06,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:40:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:40:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1575, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:40:06,361 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-23 19:40:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:06,838 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-23 19:40:06,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:40:06,839 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-23 19:40:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:06,840 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:40:06,840 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:40:06,842 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 [2018-09-23 19:40:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:40:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:40:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:40:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 19:40:06,847 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-23 19:40:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 19:40:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:40:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 19:40:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:40:06,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:06,848 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 19:40:06,848 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:06,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-23 19:40:06,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:07,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:07,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:07,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:07,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:40:07,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:07,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:08,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:08,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-23 19:40:08,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:40:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:40:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:40:08,331 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-23 19:40:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:08,709 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-23 19:40:08,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:40:08,709 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-23 19:40:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:08,710 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:40:08,710 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:40:08,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:40:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:40:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:40:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:40:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 19:40:08,718 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-23 19:40:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:08,719 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 19:40:08,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:40:08,719 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 19:40:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:40:08,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:08,720 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-23 19:40:08,720 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:08,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-23 19:40:08,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:08,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:08,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:08,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:08,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:09,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:09,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:09,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:09,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:09,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:09,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:09,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:09,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-23 19:40:09,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:40:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:40:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:40:09,266 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-23 19:40:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:09,574 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-23 19:40:09,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:40:09,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-23 19:40:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:09,575 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:40:09,575 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:40:09,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:40:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:40:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-23 19:40:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:40:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 19:40:09,584 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-23 19:40:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:09,584 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 19:40:09,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:40:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 19:40:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:40:09,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:09,585 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-23 19:40:09,585 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:09,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-23 19:40:09,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:09,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:09,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:09,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:10,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:10,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:10,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:10,167 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:40:10,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:10,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:10,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:10,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-23 19:40:10,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:40:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:40:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:40:10,711 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-23 19:40:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:11,391 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-23 19:40:11,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:40:11,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-23 19:40:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:11,393 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:40:11,394 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:40:11,395 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 [2018-09-23 19:40:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:40:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:40:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:40:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 19:40:11,403 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-23 19:40:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:11,404 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 19:40:11,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:40:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 19:40:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:40:11,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:11,405 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 19:40:11,405 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:11,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-23 19:40:11,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:11,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:11,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:11,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:11,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:11,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:11,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:11,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:12,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-23 19:40:12,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:12,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:12,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:12,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-23 19:40:12,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:40:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:40:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:40:12,874 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-23 19:40:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:13,347 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-23 19:40:13,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:40:13,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-23 19:40:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:13,349 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:40:13,349 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:40:13,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1312, Invalid=3658, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:40:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:40:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:40:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:40:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 19:40:13,361 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-23 19:40:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:13,362 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 19:40:13,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:40:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 19:40:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:40:13,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:13,363 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-23 19:40:13,363 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:13,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-23 19:40:13,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:13,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:13,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:13,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:13,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:13,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:13,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:13,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:14,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:14,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-23 19:40:14,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:40:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:40:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:40:14,001 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-23 19:40:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:14,353 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-23 19:40:14,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:40:14,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-23 19:40:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:14,355 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:40:14,355 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:40:14,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:40:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:40:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-23 19:40:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:40:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 19:40:14,364 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-23 19:40:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:14,365 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 19:40:14,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:40:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 19:40:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:40:14,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:14,366 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-23 19:40:14,366 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:14,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:14,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-23 19:40:14,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:14,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:14,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:14,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:14,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:14,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:14,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:14,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:15,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:15,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:15,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:40:16,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:16,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-23 19:40:16,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:40:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:40:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:40:16,007 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-23 19:40:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:16,518 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-23 19:40:16,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:40:16,518 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-23 19:40:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:16,519 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:40:16,519 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:40:16,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:40:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:40:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:40:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:40:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 19:40:16,529 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-23 19:40:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:16,529 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 19:40:16,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:40:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 19:40:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:40:16,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:16,530 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 19:40:16,530 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:16,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-23 19:40:16,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:16,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:17,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:17,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:17,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:17,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-23 19:40:17,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:17,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:18,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:18,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-23 19:40:18,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:40:18,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:40:18,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:40:18,375 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-23 19:40:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:18,909 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-23 19:40:18,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:40:18,909 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-23 19:40:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:18,910 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:40:18,910 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:40:18,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:40:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:40:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:40:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:40:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 19:40:18,921 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-23 19:40:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:18,922 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 19:40:18,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:40:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 19:40:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:40:18,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:18,923 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-23 19:40:18,923 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:18,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-23 19:40:18,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:18,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:18,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:18,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:18,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:19,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:19,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:19,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:19,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:19,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:19,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:19,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:19,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-23 19:40:19,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:40:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:40:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:40:19,627 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-23 19:40:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:20,156 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 19:40:20,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:40:20,157 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-23 19:40:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:20,157 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:40:20,157 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:40:20,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:40:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:40:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-23 19:40:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:40:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 19:40:20,169 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-23 19:40:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:20,169 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 19:40:20,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:40:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 19:40:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:40:20,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:20,170 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-23 19:40:20,170 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:20,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-23 19:40:20,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:20,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:20,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:21,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:21,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:21,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:21,607 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:40:21,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:21,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:22,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:22,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-23 19:40:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:40:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:40:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:40:22,358 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-23 19:40:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:23,146 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-23 19:40:23,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:40:23,146 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-23 19:40:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:23,147 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:40:23,147 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:40:23,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:40:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:40:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:40:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:40:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 19:40:23,156 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-23 19:40:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:23,157 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 19:40:23,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:40:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 19:40:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:40:23,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:23,158 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 19:40:23,158 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:23,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-23 19:40:23,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:23,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:23,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:23,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:23,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:23,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:23,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:23,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:24,030 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:40:24,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:24,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:24,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:24,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-23 19:40:24,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:40:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:40:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:40:24,983 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-23 19:40:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:25,739 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-23 19:40:25,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:40:25,739 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-23 19:40:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:25,740 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:40:25,740 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:40:25,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1956, Invalid=5526, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:40:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:40:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:40:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:40:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 19:40:25,753 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-23 19:40:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:25,753 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 19:40:25,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:40:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 19:40:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:40:25,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:25,754 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-23 19:40:25,754 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:25,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-23 19:40:25,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:25,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:25,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:25,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:26,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:26,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:26,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:26,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:26,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:26,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-23 19:40:26,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:40:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:40:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:40:26,341 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-23 19:40:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:26,757 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-23 19:40:26,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:40:26,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-23 19:40:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:26,759 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:40:26,759 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:40:26,760 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 [2018-09-23 19:40:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:40:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-23 19:40:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:40:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 19:40:26,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-23 19:40:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:26,773 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 19:40:26,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:40:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 19:40:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:40:26,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:26,774 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-23 19:40:26,774 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:26,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-23 19:40:26,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:26,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:26,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:26,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:26,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:27,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:27,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:27,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:27,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:27,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:27,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:40:28,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:28,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-23 19:40:28,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:40:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:40:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=3703, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:40:28,889 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-23 19:40:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:29,529 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-23 19:40:29,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:40:29,530 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-23 19:40:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:29,530 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:40:29,531 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:40:29,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:40:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:40:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:40:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:40:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 19:40:29,543 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-23 19:40:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:29,543 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 19:40:29,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:40:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 19:40:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:40:29,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:29,544 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 19:40:29,544 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:29,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-23 19:40:29,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:29,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:29,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:29,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:30,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:30,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:30,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:30,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:40:30,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:30,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:31,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:31,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-23 19:40:31,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:40:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:40:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:40:31,498 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-23 19:40:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:32,743 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-23 19:40:32,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:40:32,743 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-23 19:40:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:32,744 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:40:32,744 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:40:32,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:40:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:40:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:40:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:40:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 19:40:32,754 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-23 19:40:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:32,754 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 19:40:32,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:40:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 19:40:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:40:32,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:32,755 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-23 19:40:32,755 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:32,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-23 19:40:32,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:32,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:32,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:32,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:32,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:33,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:33,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:33,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:33,768 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:33,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:33,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:33,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:33,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-23 19:40:33,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:40:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:40:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:40:33,847 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-23 19:40:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:34,307 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-23 19:40:34,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:40:34,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-23 19:40:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:34,309 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:40:34,309 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:40:34,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:40:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:40:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-23 19:40:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:40:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 19:40:34,321 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-23 19:40:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:34,321 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 19:40:34,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:40:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 19:40:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:40:34,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:34,322 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-23 19:40:34,322 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:34,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-23 19:40:34,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:34,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:34,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:34,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:34,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:35,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:35,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:35,663 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:35,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-23 19:40:35,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:35,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:36,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:36,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-23 19:40:36,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:40:36,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:40:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:40:36,895 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-23 19:40:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:37,601 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-23 19:40:37,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:40:37,602 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-23 19:40:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:37,602 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:40:37,602 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:40:37,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:40:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:40:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:40:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:40:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 19:40:37,614 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-23 19:40:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:37,614 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 19:40:37,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:40:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 19:40:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:40:37,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:37,615 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 19:40:37,616 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:37,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-23 19:40:37,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:37,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:37,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:37,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:39,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:39,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:39,451 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:39,565 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:40:39,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:39,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:40,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:40,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-23 19:40:40,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:40:40,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:40:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:40:40,665 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-23 19:40:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:41,818 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-23 19:40:41,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:40:41,818 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-23 19:40:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:41,819 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:40:41,819 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:40:41,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2728, Invalid=7778, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:40:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:40:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:40:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:40:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 19:40:41,832 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-23 19:40:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:41,832 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 19:40:41,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:40:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 19:40:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:40:41,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:41,833 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-23 19:40:41,834 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:41,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-23 19:40:41,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:41,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:41,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:41,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:41,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:43,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:43,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:43,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:43,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:43,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:43,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-23 19:40:43,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:40:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:40:43,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:40:43,432 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-23 19:40:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:43,990 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 19:40:43,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:40:43,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-23 19:40:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:43,992 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:40:43,992 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:40:43,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:40:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:40:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-23 19:40:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:40:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 19:40:44,008 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-23 19:40:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:44,009 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 19:40:44,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:40:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 19:40:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:40:44,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:44,010 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-23 19:40:44,010 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:44,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:44,010 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-23 19:40:44,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:44,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:44,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:44,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:44,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:45,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:45,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:45,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:45,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:45,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:45,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:40:46,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:46,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-23 19:40:46,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:40:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:40:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1539, Invalid=5103, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:40:46,527 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-23 19:40:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:47,668 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-23 19:40:47,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:40:47,668 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-23 19:40:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:47,669 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:40:47,669 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:40:47,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:40:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:40:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:40:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:40:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 19:40:47,684 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-23 19:40:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:47,684 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 19:40:47,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:40:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 19:40:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:40:47,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:47,685 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 19:40:47,685 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:47,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-23 19:40:47,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:47,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:47,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:47,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:47,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:49,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:49,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:49,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:49,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:40:49,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:49,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:50,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:50,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-23 19:40:50,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:40:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:40:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:40:50,877 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-23 19:40:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:51,725 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-23 19:40:51,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:40:51,725 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-23 19:40:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:51,726 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:40:51,726 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:40:51,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:40:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:40:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:40:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:40:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 19:40:51,738 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-23 19:40:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:51,738 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 19:40:51,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:40:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 19:40:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:40:51,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:51,739 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-23 19:40:51,739 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:51,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-23 19:40:51,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:51,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:51,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:51,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:51,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:52,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:52,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:52,463 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:52,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:52,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:52,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:52,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-23 19:40:52,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:40:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:40:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:40:52,939 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-23 19:40:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:54,037 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-23 19:40:54,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:40:54,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-23 19:40:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:54,039 INFO L225 Difference]: With dead ends: 124 [2018-09-23 19:40:54,039 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 19:40:54,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:40:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 19:40:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-23 19:40:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:40:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-23 19:40:54,053 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-23 19:40:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:54,054 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-23 19:40:54,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:40:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-23 19:40:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:40:54,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:54,055 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-23 19:40:54,055 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:54,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-23 19:40:54,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:54,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:54,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:54,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:54,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:55,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:55,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:55,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:40:55,408 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:40:55,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:55,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:56,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:56,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-23 19:40:56,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:40:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:40:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:40:56,852 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-23 19:40:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:57,874 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-23 19:40:57,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:40:57,874 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-23 19:40:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:57,875 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:40:57,875 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:40:57,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-09-23 19:40:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:40:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:40:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:40:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 19:40:57,892 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-23 19:40:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:57,893 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 19:40:57,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:40:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 19:40:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:40:57,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:57,894 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 19:40:57,894 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:57,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-23 19:40:57,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:57,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:57,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:57,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:57,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:40:59,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:59,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:59,568 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:59,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-23 19:40:59,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:59,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:01,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:01,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-23 19:41:01,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:41:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:41:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:41:01,197 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-23 19:41:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:02,039 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-23 19:41:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:41:02,039 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-23 19:41:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:02,040 INFO L225 Difference]: With dead ends: 187 [2018-09-23 19:41:02,040 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:41:02,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3628, Invalid=10414, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 19:41:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:41:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:41:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:41:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-23 19:41:02,059 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-23 19:41:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:02,059 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-23 19:41:02,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:41:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-23 19:41:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:41:02,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:02,060 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-23 19:41:02,061 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:02,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-23 19:41:02,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:02,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:02,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:03,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:03,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:03,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:03,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:03,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:03,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-23 19:41:03,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:41:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:41:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:41:03,477 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-23 19:41:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:04,369 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-23 19:41:04,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:41:04,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-23 19:41:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:04,371 INFO L225 Difference]: With dead ends: 132 [2018-09-23 19:41:04,371 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 19:41:04,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:41:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 19:41:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-23 19:41:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:41:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-23 19:41:04,386 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-23 19:41:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-23 19:41:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:41:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-23 19:41:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:41:04,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:04,388 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-23 19:41:04,388 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:04,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-23 19:41:04,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:04,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:04,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:05,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:05,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:05,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:05,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:05,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:05,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:41:07,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:07,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-23 19:41:07,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:41:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:41:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2015, Invalid=6727, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:41:07,679 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-23 19:41:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:08,721 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-23 19:41:08,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:41:08,722 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-23 19:41:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:08,722 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:41:08,722 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:41:08,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:41:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:41:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:41:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:41:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 19:41:08,740 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-23 19:41:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:08,741 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 19:41:08,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:41:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 19:41:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:41:08,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:08,742 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 19:41:08,742 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:08,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-23 19:41:08,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:08,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:08,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:08,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:08,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:10,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:10,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:10,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:10,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-23 19:41:10,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:10,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:11,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:11,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-23 19:41:11,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:41:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:41:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:41:11,968 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-23 19:41:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:13,108 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-23 19:41:13,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:41:13,108 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-23 19:41:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:13,109 INFO L225 Difference]: With dead ends: 199 [2018-09-23 19:41:13,109 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:41:13,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-09-23 19:41:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:41:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:41:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:41:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-23 19:41:13,124 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-23 19:41:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:13,125 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-23 19:41:13,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:41:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-23 19:41:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:41:13,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:13,125 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-23 19:41:13,125 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:13,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-23 19:41:13,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:13,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:13,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:13,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:13,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:14,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:14,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:14,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:14,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:14,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:14,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:14,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:14,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-23 19:41:14,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:41:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:41:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:41:14,934 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-23 19:41:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:15,625 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 19:41:15,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:41:15,626 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-23 19:41:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:15,627 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:41:15,627 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 19:41:15,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:41:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 19:41:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-23 19:41:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:41:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-23 19:41:15,646 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-23 19:41:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:15,646 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-23 19:41:15,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:41:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-23 19:41:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:41:15,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:15,647 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-23 19:41:15,647 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:15,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-23 19:41:15,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:15,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:15,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:15,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:15,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:17,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:17,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:17,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:17,393 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:41:17,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:17,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:19,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:19,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-23 19:41:19,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:41:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:41:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:41:19,541 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-23 19:41:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:20,717 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-23 19:41:20,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:41:20,717 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-23 19:41:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:20,718 INFO L225 Difference]: With dead ends: 209 [2018-09-23 19:41:20,718 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:41:20,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-09-23 19:41:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:41:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:41:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:41:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 19:41:20,734 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-23 19:41:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:20,734 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 19:41:20,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:41:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 19:41:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:41:20,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:20,735 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 19:41:20,735 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:20,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-23 19:41:20,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:20,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:20,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:20,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:20,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:22,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:22,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:22,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:22,800 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:41:22,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:22,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:24,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:24,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-23 19:41:24,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:41:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:41:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:41:24,930 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-23 19:41:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:26,137 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-23 19:41:26,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:41:26,137 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-23 19:41:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:26,138 INFO L225 Difference]: With dead ends: 211 [2018-09-23 19:41:26,138 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:41:26,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4656, Invalid=13434, Unknown=0, NotChecked=0, Total=18090 [2018-09-23 19:41:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:41:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:41:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:41:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-23 19:41:26,154 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-23 19:41:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:26,155 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-23 19:41:26,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:41:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-23 19:41:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:41:26,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:26,155 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-23 19:41:26,156 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:26,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-23 19:41:26,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:26,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:26,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:26,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:26,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:27,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:27,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:27,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:27,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:27,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:27,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-23 19:41:27,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:41:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:41:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:41:27,624 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-23 19:41:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:28,388 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-23 19:41:28,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:41:28,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-23 19:41:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:28,390 INFO L225 Difference]: With dead ends: 148 [2018-09-23 19:41:28,390 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 19:41:28,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:41:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 19:41:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-23 19:41:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:41:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-23 19:41:28,408 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-23 19:41:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:28,408 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-23 19:41:28,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:41:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-23 19:41:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:41:28,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:28,409 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-23 19:41:28,410 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:28,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-23 19:41:28,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:28,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:28,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:28,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:28,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:30,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:30,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:30,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:30,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:30,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:30,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:41:33,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:33,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-23 19:41:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:41:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:41:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=8575, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:41:33,556 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-23 19:41:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:35,055 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-23 19:41:35,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:41:35,055 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-23 19:41:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:35,056 INFO L225 Difference]: With dead ends: 221 [2018-09-23 19:41:35,056 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:41:35,057 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 [2018-09-23 19:41:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:41:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:41:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:41:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 19:41:35,073 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-23 19:41:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:35,073 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 19:41:35,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:41:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 19:41:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:41:35,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:35,074 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 19:41:35,074 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:35,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-23 19:41:35,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:35,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:35,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:35,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:35,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:36,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:36,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:36,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:41:36,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:41:36,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:36,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:38,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:38,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-23 19:41:38,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:41:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:41:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:41:38,901 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-23 19:41:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:40,480 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-23 19:41:40,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:41:40,481 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-23 19:41:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:40,481 INFO L225 Difference]: With dead ends: 223 [2018-09-23 19:41:40,482 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:41:40,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-09-23 19:41:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:41:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:41:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:41:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-23 19:41:40,500 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-23 19:41:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:40,500 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-23 19:41:40,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:41:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-23 19:41:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:41:40,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:40,501 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-23 19:41:40,501 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:40,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-23 19:41:40,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:40,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:40,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:40,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:40,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:41,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:41,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:41,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:41:41,370 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:41:41,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:41,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:41,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:41,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-23 19:41:41,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:41:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:41:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:41:41,503 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-23 19:41:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:42,302 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-23 19:41:42,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:41:42,303 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-23 19:41:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:42,304 INFO L225 Difference]: With dead ends: 156 [2018-09-23 19:41:42,304 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 19:41:42,305 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 [2018-09-23 19:41:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 19:41:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-23 19:41:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:41:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-23 19:41:42,323 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-23 19:41:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:42,323 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-23 19:41:42,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:41:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-23 19:41:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:41:42,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:42,324 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-23 19:41:42,325 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:42,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-23 19:41:42,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:42,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:42,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:42,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:44,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:44,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:44,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:41:44,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-23 19:41:44,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:44,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:46,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:46,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-23 19:41:46,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 19:41:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 19:41:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:41:46,903 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-23 19:41:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:48,306 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-23 19:41:48,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:41:48,307 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-23 19:41:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:48,308 INFO L225 Difference]: With dead ends: 233 [2018-09-23 19:41:48,308 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:41:48,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-23 19:41:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:41:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:41:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:41:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 19:41:48,333 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-23 19:41:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:48,333 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 19:41:48,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 19:41:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 19:41:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:41:48,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:48,334 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 19:41:48,335 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:48,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-23 19:41:48,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:48,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:48,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:48,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:50,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:50,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:50,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:41:50,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 19:41:50,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:50,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:52,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:52,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-23 19:41:52,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:41:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:41:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:41:52,835 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-23 19:41:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:54,167 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-23 19:41:54,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:41:54,167 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-23 19:41:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:54,168 INFO L225 Difference]: With dead ends: 235 [2018-09-23 19:41:54,168 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:41:54,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5812, Invalid=16838, Unknown=0, NotChecked=0, Total=22650 [2018-09-23 19:41:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:41:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:41:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:41:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-23 19:41:54,188 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-23 19:41:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:54,188 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-23 19:41:54,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:41:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-23 19:41:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:41:54,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:54,189 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-23 19:41:54,190 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:54,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-23 19:41:54,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:54,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:54,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:41:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:55,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:55,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:41:55,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:55,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:41:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:55,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:41:55,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-23 19:41:55,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:41:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:41:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:41:55,372 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-23 19:41:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:41:56,249 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 19:41:56,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:41:56,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-23 19:41:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:41:56,251 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:41:56,251 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 19:41:56,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:41:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 19:41:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-23 19:41:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:41:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-23 19:41:56,279 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-23 19:41:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:41:56,279 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-23 19:41:56,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:41:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-23 19:41:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:41:56,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:41:56,281 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-23 19:41:56,281 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:41:56,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:41:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-23 19:41:56,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:41:56,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:41:56,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:56,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:41:56,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:41:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:41:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:41:58,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:41:58,184 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 [2018-09-23 19:41:58,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:41:58,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:41:58,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:41:58,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:42:01,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:01,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-23 19:42:01,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 19:42:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 19:42:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3159, Invalid=10647, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:42:01,144 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-23 19:42:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:02,730 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-23 19:42:02,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:42:02,731 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-23 19:42:02,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:02,731 INFO L225 Difference]: With dead ends: 245 [2018-09-23 19:42:02,731 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:42:02,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:42:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:42:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:42:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:42:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 19:42:02,752 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-23 19:42:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:02,752 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 19:42:02,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 19:42:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 19:42:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:42:02,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:02,753 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 19:42:02,753 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:02,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:02,754 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-23 19:42:02,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:02,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:02,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:02,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:02,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:04,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:04,700 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 [2018-09-23 19:42:04,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:42:04,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:42:04,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:04,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:07,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:07,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-23 19:42:07,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 19:42:07,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 19:42:07,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:42:07,557 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-23 19:42:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:09,127 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-23 19:42:09,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:42:09,128 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-23 19:42:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:09,128 INFO L225 Difference]: With dead ends: 247 [2018-09-23 19:42:09,128 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:42:09,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-09-23 19:42:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:42:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:42:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:42:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-23 19:42:09,149 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-23 19:42:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:09,149 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-23 19:42:09,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 19:42:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-23 19:42:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:42:09,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:09,150 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-23 19:42:09,150 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:09,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-23 19:42:09,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:09,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:09,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:09,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:09,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:09,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:09,974 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 [2018-09-23 19:42:09,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:10,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:10,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:10,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:10,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:10,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-23 19:42:10,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:42:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:42:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:42:10,236 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-23 19:42:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:11,334 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-23 19:42:11,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:42:11,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-23 19:42:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:11,336 INFO L225 Difference]: With dead ends: 172 [2018-09-23 19:42:11,336 INFO L226 Difference]: Without dead ends: 170 [2018-09-23 19:42:11,337 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 [2018-09-23 19:42:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-23 19:42:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-23 19:42:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:42:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-23 19:42:11,359 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-23 19:42:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:11,359 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-23 19:42:11,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:42:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-23 19:42:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:42:11,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:11,360 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-23 19:42:11,360 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:11,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-23 19:42:11,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:11,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:11,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:11,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:13,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:13,551 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 [2018-09-23 19:42:13,559 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:42:13,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:42:13,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:13,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:16,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:16,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-23 19:42:16,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-23 19:42:16,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-23 19:42:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 19:42:16,656 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-23 19:42:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:18,334 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-23 19:42:18,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:42:18,335 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-23 19:42:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:18,336 INFO L225 Difference]: With dead ends: 257 [2018-09-23 19:42:18,336 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:42:18,337 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 [2018-09-23 19:42:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:42:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 19:42:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:42:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-23 19:42:18,367 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-23 19:42:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:18,368 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-23 19:42:18,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-23 19:42:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-23 19:42:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:42:18,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:18,369 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-23 19:42:18,369 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:18,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-23 19:42:18,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:18,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:18,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:18,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:21,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:21,354 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 [2018-09-23 19:42:21,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:21,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-23 19:42:21,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:21,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:24,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:24,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-23 19:42:24,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 19:42:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 19:42:24,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:42:24,202 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-23 19:42:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:26,191 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-23 19:42:26,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:42:26,191 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-23 19:42:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:26,192 INFO L225 Difference]: With dead ends: 259 [2018-09-23 19:42:26,193 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:42:26,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7096, Invalid=20626, Unknown=0, NotChecked=0, Total=27722 [2018-09-23 19:42:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:42:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:42:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:42:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-23 19:42:26,217 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-23 19:42:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:26,218 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-23 19:42:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 19:42:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-23 19:42:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 19:42:26,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:26,219 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-23 19:42:26,219 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:26,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-23 19:42:26,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:26,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:26,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:26,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:26,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:27,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:27,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:42:27,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:27,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:27,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:27,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-23 19:42:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:42:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:42:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:42:27,765 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-23 19:42:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:28,797 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-23 19:42:28,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:42:28,797 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-23 19:42:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:28,798 INFO L225 Difference]: With dead ends: 180 [2018-09-23 19:42:28,799 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 19:42:28,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:42:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 19:42:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-23 19:42:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 19:42:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-23 19:42:28,830 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-23 19:42:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-23 19:42:28,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:42:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-23 19:42:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:42:28,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:28,832 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-23 19:42:28,832 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:28,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-23 19:42:28,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:28,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:28,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:42:28,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:31,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:31,464 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 [2018-09-23 19:42:31,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:42:31,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:42:31,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:31,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:42:34,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:34,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-23 19:42:34,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 19:42:34,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 19:42:34,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3827, Invalid=12943, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:42:34,490 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-23 19:42:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:36,645 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-23 19:42:36,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:42:36,645 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-23 19:42:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:36,646 INFO L225 Difference]: With dead ends: 269 [2018-09-23 19:42:36,646 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:42:36,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6153 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-23 19:42:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:42:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 19:42:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:42:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-23 19:42:36,671 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-23 19:42:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:36,672 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-23 19:42:36,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 19:42:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-23 19:42:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:42:36,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:36,673 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-23 19:42:36,673 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:36,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-23 19:42:36,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:36,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:36,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:36,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:36,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:39,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:39,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:42:39,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:42:39,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-23 19:42:39,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:39,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:42,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:42,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-23 19:42:42,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 19:42:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 19:42:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:42:42,401 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-23 19:42:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:44,074 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-23 19:42:44,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:42:44,074 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-23 19:42:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:44,075 INFO L225 Difference]: With dead ends: 271 [2018-09-23 19:42:44,075 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 19:42:44,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6323 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-09-23 19:42:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 19:42:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 19:42:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:42:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-23 19:42:44,100 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-23 19:42:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:44,100 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-23 19:42:44,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 19:42:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-23 19:42:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 19:42:44,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:44,101 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-23 19:42:44,101 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:44,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-23 19:42:44,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:44,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:44,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:44,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:44,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:45,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:45,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:42:45,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:42:45,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:42:45,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:45,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:45,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:45,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-23 19:42:45,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:42:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:42:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:42:45,336 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-23 19:42:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:46,666 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-23 19:42:46,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:42:46,667 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-23 19:42:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:46,668 INFO L225 Difference]: With dead ends: 188 [2018-09-23 19:42:46,668 INFO L226 Difference]: Without dead ends: 186 [2018-09-23 19:42:46,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:42:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-23 19:42:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-23 19:42:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 19:42:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-23 19:42:46,696 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-23 19:42:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:46,696 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-23 19:42:46,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:42:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-23 19:42:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 19:42:46,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:46,697 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-23 19:42:46,698 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:46,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-23 19:42:46,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:46,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:46,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:46,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:46,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:49,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:49,263 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) [2018-09-23 19:42:49,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:42:49,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:42:49,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:49,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:42:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:52,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:42:52,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-23 19:42:52,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-23 19:42:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-23 19:42:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4276, Invalid=14356, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 19:42:52,843 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-23 19:42:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:42:54,619 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-23 19:42:54,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:42:54,619 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-23 19:42:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:42:54,620 INFO L225 Difference]: With dead ends: 281 [2018-09-23 19:42:54,620 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:42:54,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-23 19:42:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:42:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:42:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:42:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-23 19:42:54,654 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-23 19:42:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:42:54,654 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-23 19:42:54,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-23 19:42:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-23 19:42:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 19:42:54,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:42:54,655 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-23 19:42:54,655 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:42:54,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:42:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-23 19:42:54,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:42:54,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:42:54,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:54,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:42:54,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:42:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:42:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:42:57,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:42:57,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:42:57,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:42:57,789 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 19:42:57,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:42:57,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:00,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:00,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-23 19:43:00,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 19:43:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 19:43:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:43:00,914 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-23 19:43:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:03,293 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-23 19:43:03,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:43:03,293 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-23 19:43:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:03,294 INFO L225 Difference]: With dead ends: 283 [2018-09-23 19:43:03,294 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 19:43:03,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8508, Invalid=24798, Unknown=0, NotChecked=0, Total=33306 [2018-09-23 19:43:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 19:43:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 19:43:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:43:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-23 19:43:03,328 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-23 19:43:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:03,328 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-23 19:43:03,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 19:43:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-23 19:43:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:43:03,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:03,329 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-23 19:43:03,329 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:03,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:03,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-23 19:43:03,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:03,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:03,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:03,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:03,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:04,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:04,484 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 [2018-09-23 19:43:04,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:43:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:04,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:04,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:04,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-23 19:43:04,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:43:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:43:04,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:43:04,763 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-23 19:43:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:05,904 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-23 19:43:05,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:43:05,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-23 19:43:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:05,905 INFO L225 Difference]: With dead ends: 196 [2018-09-23 19:43:05,906 INFO L226 Difference]: Without dead ends: 194 [2018-09-23 19:43:05,907 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 [2018-09-23 19:43:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-23 19:43:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-23 19:43:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:43:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-23 19:43:05,935 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-23 19:43:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:05,935 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-23 19:43:05,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:43:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-23 19:43:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 19:43:05,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:05,936 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-23 19:43:05,937 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:05,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-23 19:43:05,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:05,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:05,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:43:05,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:09,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:09,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:43:09,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:43:09,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:43:09,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:09,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:43:12,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:12,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-23 19:43:12,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 19:43:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 19:43:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4559, Invalid=15463, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:43:12,735 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-23 19:43:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:14,910 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-23 19:43:14,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:43:14,910 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-23 19:43:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:14,911 INFO L225 Difference]: With dead ends: 293 [2018-09-23 19:43:14,911 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:43:14,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7383 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-09-23 19:43:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:43:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 19:43:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 19:43:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-23 19:43:14,940 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-23 19:43:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:14,940 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-23 19:43:14,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 19:43:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-23 19:43:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:43:14,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:14,941 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-23 19:43:14,941 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:14,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-23 19:43:14,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:14,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:14,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:14,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:14,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:18,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:18,019 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 [2018-09-23 19:43:18,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:43:18,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 19:43:18,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:18,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:21,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:21,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-23 19:43:21,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 19:43:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 19:43:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:43:21,811 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-23 19:43:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:24,257 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-23 19:43:24,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:43:24,257 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-23 19:43:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:24,258 INFO L225 Difference]: With dead ends: 295 [2018-09-23 19:43:24,258 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 19:43:24,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9262, Invalid=27028, Unknown=0, NotChecked=0, Total=36290 [2018-09-23 19:43:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 19:43:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 19:43:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 19:43:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-23 19:43:24,287 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-23 19:43:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:24,287 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-23 19:43:24,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 19:43:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-23 19:43:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 19:43:24,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:24,288 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-23 19:43:24,289 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:24,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-23 19:43:24,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:24,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:24,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:24,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:25,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:25,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:43:25,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:43:25,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:43:25,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:25,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:25,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:25,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-23 19:43:25,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:43:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:43:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:43:25,678 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-23 19:43:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:26,944 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-23 19:43:26,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:43:26,945 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-23 19:43:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:26,945 INFO L225 Difference]: With dead ends: 204 [2018-09-23 19:43:26,945 INFO L226 Difference]: Without dead ends: 202 [2018-09-23 19:43:26,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:43:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-23 19:43:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-23 19:43:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 19:43:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-23 19:43:26,984 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-23 19:43:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:26,985 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-23 19:43:26,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:43:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-23 19:43:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 19:43:26,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:26,986 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-23 19:43:26,986 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:26,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-23 19:43:26,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:26,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:26,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:26,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:26,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:43:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:30,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:43:30,187 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 [2018-09-23 19:43:30,194 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:43:30,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-23 19:43:30,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:43:30,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:43:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:43:34,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:43:34,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-09-23 19:43:34,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-23 19:43:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-23 19:43:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5048, Invalid=17004, Unknown=0, NotChecked=0, Total=22052 [2018-09-23 19:43:34,223 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-09-23 19:43:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:43:36,664 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-09-23 19:43:36,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:43:36,664 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-09-23 19:43:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:43:36,665 INFO L225 Difference]: With dead ends: 305 [2018-09-23 19:43:36,665 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:43:36,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-09-23 19:43:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:43:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 19:43:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 19:43:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-23 19:43:36,700 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-23 19:43:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:43:36,700 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-23 19:43:36,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-23 19:43:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-23 19:43:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 19:43:36,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:43:36,702 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-23 19:43:36,702 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:43:36,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:43:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-09-23 19:43:36,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:43:36,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:43:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:36,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:43:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:43:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:43:38,390 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:43:38,393 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:43:38,394 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:43:38 BoogieIcfgContainer [2018-09-23 19:43:38,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:43:38,394 INFO L168 Benchmark]: Toolchain (without parser) took 235252.72 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 251.7 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 320.3 MB). Peak memory consumption was 571.9 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:38,395 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:38,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:38,396 INFO L168 Benchmark]: Boogie Preprocessor took 25.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:43:38,396 INFO L168 Benchmark]: RCFGBuilder took 307.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:38,397 INFO L168 Benchmark]: TraceAbstraction took 234866.12 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 251.7 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 299.1 MB). Peak memory consumption was 550.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:43:38,399 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.88 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 25.38 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 307.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234866.12 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 251.7 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 299.1 MB). Peak memory consumption was 550.8 MB. 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 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 234.7s OverallTime, 74 OverallIterations, 50 TraceHistogramMax, 64.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2093 SDtfs, 1795 SDslu, 26489 SDs, 0 SdLazy, 27395 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13008 GetRequests, 6886 SyntacticMatches, 0 SemanticMatches, 6122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152951 ImplicationChecksByTransitivity, 187.2s 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, 8.3s SatisfiabilityAnalysisTime, 154.8s 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-0-2018-09-23_19-43-38-408.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-0-2018-09-23_19-43-38-408.csv Completed graceful shutdown