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/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:23:48,983 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:23:48,985 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:23:48,997 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:23:48,997 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:23:48,998 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:23:48,999 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:23:49,001 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:23:49,003 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:23:49,004 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:23:49,005 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:23:49,030 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:23:49,045 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:23:49,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:23:49,046 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:23:49,047 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:23:49,047 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:23:49,048 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:23:49,048 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:23:49,048 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:23:49,048 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:23:49,048 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:23:49,049 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:23:49,049 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:23:49,049 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:23:49,049 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:23:49,049 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:23:49,050 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:23:49,050 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:23:49,050 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:23:49,050 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:23:49,051 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:23:49,051 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:23:49,051 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:23:49,051 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:23:49,051 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:23:49,051 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:23:49,052 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:23:49,052 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:23:49,052 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:23:49,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:23:49,052 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:23:49,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:23:49,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:23:49,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:23:49,125 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:23:49,126 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:23:49,127 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-30 23:23:49,128 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-30 23:23:49,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:23:49,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:23:49,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:23:49,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:23:49,181 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:23:49,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:23:49,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:23:49,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:23:49,224 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:23:49,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... [2018-09-30 23:23:49,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:23:49,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:23:49,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:23:49,245 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:23:49,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:23:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:23:49,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:23:49,564 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:23:49,564 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:23:49 BoogieIcfgContainer [2018-09-30 23:23:49,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:23:49,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:23:49,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:23:49,572 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:23:49,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:23:49" (1/2) ... [2018-09-30 23:23:49,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ee61e1 and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:23:49, skipping insertion in model container [2018-09-30 23:23:49,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:23:49" (2/2) ... [2018-09-30 23:23:49,576 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-30 23:23:49,587 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:23:49,597 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:23:49,652 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:23:49,653 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:23:49,653 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:23:49,653 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:23:49,654 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:23:49,654 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:23:49,654 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:23:49,654 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:23:49,654 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:23:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:23:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:23:49,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:49,677 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:23:49,678 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:49,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:23:49,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:49,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:49,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:49,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:49,831 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:23:49,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:23:49,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:23:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:23:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:23:49,852 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:23:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:49,901 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:23:49,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:23:49,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:23:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:49,914 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:23:49,915 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:23:49,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:23:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:23:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:23:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:23:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:23:49,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:23:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:49,959 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:23:49,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:23:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:23:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:23:49,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:49,960 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:23:49,960 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:49,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:23:49,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:49,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:49,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:49,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:50,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:50,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:50,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:50,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:23:50,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:23:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:23:50,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:23:50,192 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 23:23:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:50,234 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:23:50,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:23:50,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:23:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:50,241 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:23:50,241 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:23:50,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:23:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:23:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:23:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:23:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:23:50,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:23:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:50,248 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:23:50,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:23:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:23:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:23:50,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:50,253 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:23:50,254 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:50,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 23:23:50,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:50,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:50,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:50,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:50,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:50,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:50,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:50,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:50,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:50,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:23:50,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:23:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:23:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:23:50,401 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 23:23:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:50,451 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:23:50,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:23:50,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:23:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:50,453 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:23:50,453 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:23:50,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:23:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:23:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:23:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:23:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:23:50,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:23:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:50,457 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:23:50,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:23:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:23:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:23:50,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:50,458 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:23:50,459 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:50,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 23:23:50,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:50,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:50,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:50,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:50,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:50,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:50,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:23:50,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:50,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:50,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:50,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:23:50,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:23:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:23:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:23:50,627 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 23:23:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:50,666 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:23:50,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:23:50,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:23:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:50,669 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:23:50,669 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:23:50,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:23:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:23:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:23:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:23:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:23:50,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:23:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:50,674 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:23:50,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:23:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:23:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:23:50,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:50,675 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:23:50,675 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:50,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 23:23:50,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:50,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:50,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:50,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:51,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:51,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:51,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:51,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:23:51,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:23:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:23:51,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:23:51,077 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 23:23:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:51,155 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:23:51,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:23:51,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 23:23:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:51,157 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:23:51,158 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:23:51,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:23:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:23:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:23:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:23:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:23:51,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:23:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:51,167 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:23:51,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:23:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:23:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:23:51,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:51,170 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:23:51,171 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:51,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 23:23:51,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:51,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:51,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:51,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:51,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:51,343 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:23:51,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:51,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:23:51,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:23:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:23:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:23:51,382 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 23:23:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:51,475 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:23:51,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:23:51,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:23:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:51,476 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:23:51,476 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:23:51,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:23:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:23:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:23:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:23:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:23:51,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:23:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:51,483 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:23:51,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:23:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:23:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:23:51,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:51,489 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:23:51,489 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:51,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 23:23:51,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:51,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:51,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:51,652 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:51,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:23:51,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:51,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:23:51,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:23:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:23:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:23:51,703 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 23:23:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:51,765 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:23:51,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:23:51,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:23:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:51,767 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:23:51,768 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:23:51,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:23:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:23:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:23:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:23:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:23:51,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:23:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:51,773 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:23:51,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:23:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:23:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:23:51,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:51,774 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:23:51,774 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:51,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 23:23:51,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:51,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:51,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:51,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:51,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:51,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:23:51,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:23:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:23:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:23:51,984 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 23:23:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:52,204 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:23:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:23:52,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:23:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:52,206 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:23:52,206 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:23:52,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:23:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:23:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:23:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:23:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:23:52,214 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:23:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:52,214 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:23:52,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:23:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:23:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:23:52,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:52,215 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:23:52,217 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:52,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 23:23:52,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:52,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:52,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:52,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:52,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:52,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:52,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:52,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:52,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:52,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:23:52,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:23:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:23:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:23:52,467 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 23:23:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:52,522 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:23:52,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:23:52,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 23:23:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:52,524 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:23:52,524 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:23:52,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:23:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:23:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:23:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:23:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:23:52,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:23:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:52,529 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:23:52,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:23:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:23:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:23:52,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:52,530 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:23:52,531 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:52,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:52,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 23:23:52,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:52,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:52,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:52,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:52,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:52,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:52,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:23:52,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:52,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:52,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:23:52,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:23:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:23:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:23:52,813 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 23:23:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:52,888 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:23:52,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:23:52,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:23:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:52,890 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:23:52,890 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:23:52,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:23:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:23:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:23:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:23:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:23:52,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:23:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:52,897 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:23:52,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:23:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:23:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:23:52,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:52,898 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:23:52,898 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:52,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 23:23:52,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:52,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:52,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:52,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:53,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:53,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:53,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:53,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:53,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:53,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:53,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:53,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:23:53,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:23:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:23:53,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:23:53,194 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 23:23:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:53,245 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:23:53,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:23:53,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 23:23:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:53,247 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:23:53,247 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:23:53,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:23:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:23:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:23:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:23:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:23:53,253 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:23:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:53,253 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:23:53,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:23:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:23:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:23:53,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:53,254 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:23:53,255 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:53,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 23:23:53,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:53,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:53,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:53,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:53,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:53,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:53,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:23:53,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:53,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:53,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:53,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:23:53,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:23:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:23:53,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:23:53,556 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 23:23:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:53,787 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:23:53,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:23:53,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:23:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:53,789 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:23:53,789 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:23:53,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:23:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:23:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:23:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:23:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:23:53,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:23:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:53,799 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:23:53,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:23:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:23:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:23:53,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:53,800 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:23:53,801 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:53,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 23:23:53,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:53,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:53,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:54,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:54,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:54,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:23:54,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:54,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:54,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:23:54,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:23:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:23:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:23:54,117 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 23:23:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:54,166 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:23:54,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:23:54,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 23:23:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:54,167 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:23:54,168 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:23:54,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:23:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:23:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:23:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:23:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:23:54,173 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:23:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:54,173 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:23:54,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:23:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:23:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:23:54,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:54,175 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:23:54,175 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:54,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 23:23:54,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:54,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:54,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:54,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:54,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:54,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:54,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:54,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:23:54,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:23:54,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:23:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:23:54,515 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 23:23:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:54,556 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:23:54,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:23:54,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:23:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:54,558 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:23:54,558 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:23:54,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:23:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:23:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:23:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:23:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:23:54,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:23:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:54,564 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:23:54,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:23:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:23:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:23:54,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:54,565 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:23:54,565 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:54,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:54,566 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 23:23:54,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:54,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:54,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:54,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:54,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:54,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:54,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:54,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:54,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:54,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:54,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:23:54,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:23:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:23:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:23:54,828 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 23:23:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:54,866 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:23:54,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:23:54,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:23:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:54,868 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:23:54,868 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:23:54,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:23:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:23:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:23:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:23:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:23:54,874 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:23:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:54,874 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:23:54,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:23:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:23:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:23:54,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:54,875 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:23:54,876 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:54,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 23:23:54,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:54,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:54,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:54,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:55,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:55,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:55,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:23:55,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:55,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:55,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:23:55,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:23:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:23:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:23:55,159 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 23:23:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:55,230 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:23:55,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:23:55,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:23:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:55,233 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:23:55,233 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:23:55,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:23:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:23:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:23:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:23:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:23:55,238 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:23:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:55,239 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:23:55,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:23:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:23:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:23:55,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:55,240 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:23:55,240 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:55,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:55,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 23:23:55,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:55,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:55,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:55,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:55,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:55,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:55,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:55,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:55,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:55,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:23:55,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:23:55,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:23:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:23:55,578 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 23:23:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:55,667 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:23:55,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:23:55,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 23:23:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:55,671 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:23:55,671 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:23:55,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:23:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:23:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:23:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:23:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:23:55,679 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:23:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:55,679 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:23:55,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:23:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:23:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:23:55,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:55,681 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:23:55,681 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:55,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 23:23:55,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:55,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:55,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:55,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:56,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:56,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:56,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:56,338 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:23:56,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:56,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:56,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:56,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:23:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:23:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:23:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:23:56,384 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 23:23:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:56,610 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:23:56,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:23:56,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:23:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:56,611 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:23:56,611 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:23:56,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:23:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:23:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:23:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:23:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:23:56,616 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:23:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:56,616 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:23:56,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:23:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:23:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:23:56,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:56,617 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:23:56,618 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:56,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 23:23:56,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:56,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:56,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:56,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:56,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:57,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:57,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:57,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:23:57,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:57,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:57,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:23:57,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:23:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:23:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:23:57,116 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 23:23:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:57,172 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:23:57,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:23:57,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:23:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:57,174 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:23:57,174 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:23:57,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:23:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:23:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:23:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:23:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:23:57,179 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:23:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:57,180 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:23:57,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:23:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:23:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:23:57,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:57,181 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:23:57,181 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:57,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 23:23:57,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:57,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:57,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:57,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:57,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:57,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:57,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:57,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:57,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:23:57,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:23:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:23:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:23:57,623 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 23:23:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:57,704 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:23:57,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:23:57,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:23:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:57,705 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:23:57,705 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:23:57,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:23:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:23:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:23:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:23:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:23:57,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:23:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:57,712 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:23:57,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:23:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:23:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:23:57,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:57,713 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:23:57,713 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:57,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 23:23:57,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:57,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:57,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:57,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:58,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:58,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:58,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:58,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:58,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:58,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:23:58,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:23:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:23:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:23:58,069 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 23:23:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:58,195 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:23:58,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:23:58,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 23:23:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:58,196 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:23:58,196 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:23:58,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:23:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:23:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:23:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:23:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:23:58,202 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:23:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:58,203 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:23:58,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:23:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:23:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:23:58,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:58,204 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:23:58,204 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:58,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 23:23:58,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:58,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:58,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:58,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:58,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:58,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:58,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:23:58,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:58,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:58,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:58,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:23:58,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:23:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:23:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:23:58,871 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 23:23:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:59,195 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:23:59,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:23:59,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:23:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:59,197 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:23:59,198 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:23:59,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:23:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:23:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:23:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:23:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:23:59,203 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:23:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:23:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:23:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:23:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:23:59,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:59,204 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:23:59,205 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:59,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 23:23:59,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:59,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:59,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:59,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:59,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:59,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:59,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:59,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:59,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:59,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:59,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:59,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:59,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:23:59,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:23:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:23:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:23:59,658 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 23:23:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:59,724 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:23:59,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:23:59,724 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 23:23:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:59,725 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:23:59,725 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:23:59,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:23:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:23:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:23:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:23:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:23:59,731 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:23:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:59,732 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:23:59,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:23:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:23:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:23:59,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:59,733 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:23:59,733 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:59,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 23:23:59,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:59,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:59,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:59,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:00,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:00,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:00,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:00,267 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:24:00,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:00,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:00,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:00,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:24:00,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:24:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:24:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:24:00,314 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 23:24:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:00,637 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:24:00,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:24:00,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:24:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:00,638 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:24:00,638 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:24:00,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:24:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:24:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:24:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:24:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:24:00,643 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:24:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:00,643 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:24:00,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:24:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:24:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:24:00,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:00,644 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 23:24:00,644 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:00,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 23:24:00,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:00,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:00,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:00,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:00,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:01,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:01,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:01,468 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:24:01,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:01,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:01,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:24:01,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:24:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:24:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:24:01,517 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 23:24:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:01,580 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:24:01,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:24:01,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 23:24:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:01,582 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:24:01,582 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:24:01,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:24:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:24:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:24:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:24:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:24:01,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 23:24:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:01,587 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:24:01,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:24:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:24:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:24:01,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:01,588 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 23:24:01,589 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:01,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 23:24:01,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:01,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:01,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:01,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:02,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:02,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:02,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:02,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:02,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:02,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:24:02,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:24:02,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:24:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:24:02,309 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 23:24:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:02,383 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:24:02,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:24:02,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 23:24:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:02,385 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:24:02,385 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:24:02,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:24:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:24:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:24:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:24:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:24:02,390 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 23:24:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:02,390 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:24:02,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:24:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:24:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:24:02,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:02,391 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 23:24:02,391 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:02,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 23:24:02,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:02,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:02,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:02,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:03,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:03,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:03,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:03,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:03,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:03,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:03,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:03,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:24:03,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:24:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:24:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:24:03,543 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 23:24:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:03,622 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:24:03,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:24:03,623 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 23:24:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:03,624 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:24:03,624 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:24:03,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:24:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:24:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:24:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:24:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:24:03,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 23:24:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:03,628 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:24:03,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:24:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:24:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:24:03,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:03,629 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 23:24:03,629 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:03,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 23:24:03,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:03,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:03,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:03,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:03,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:04,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:04,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:04,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:04,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:24:04,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:04,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:04,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:04,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:24:04,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:24:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:24:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:24:04,798 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 23:24:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:04,836 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:24:04,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:24:04,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 23:24:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:04,838 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:24:04,838 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:24:04,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:24:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:24:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:24:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:24:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:24:04,842 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 23:24:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:04,843 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:24:04,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:24:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:24:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:24:04,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:04,844 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 23:24:04,844 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:04,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 23:24:04,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:04,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:04,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:04,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:05,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:05,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:05,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:05,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:05,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:05,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:05,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:05,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:24:05,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:24:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:24:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:24:05,653 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 23:24:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:05,723 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:24:05,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:24:05,723 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 23:24:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:05,724 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:24:05,724 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:24:05,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:24:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:24:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:24:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:24:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:24:05,729 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 23:24:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:05,729 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:24:05,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:24:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:24:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:24:05,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:05,730 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 23:24:05,730 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:05,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:05,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 23:24:05,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:05,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:05,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:05,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:05,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:06,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:06,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:06,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:06,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:24:06,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:06,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:06,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:06,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:24:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:24:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:24:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:24:06,416 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 23:24:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:06,509 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:24:06,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:24:06,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 23:24:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:06,511 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:24:06,511 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:24:06,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:24:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:24:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:24:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:24:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:24:06,515 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 23:24:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:24:06,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:24:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:24:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:24:06,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:06,516 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 23:24:06,516 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:06,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 23:24:06,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:06,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:06,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:06,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:07,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:07,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:07,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:07,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:24:07,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:07,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:07,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:07,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:24:07,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:24:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:24:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:24:07,351 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 23:24:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:07,458 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:24:07,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:24:07,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 23:24:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:07,459 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:24:07,459 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:24:07,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:24:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:24:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:24:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:24:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:24:07,463 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 23:24:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:24:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:24:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:24:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:24:07,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:07,464 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 23:24:07,464 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:07,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 23:24:07,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:07,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:07,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:07,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:07,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:07,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:07,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:08,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:08,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:08,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:08,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:24:08,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:24:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:24:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:24:08,067 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 23:24:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:08,257 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:24:08,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:24:08,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 23:24:08,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:08,259 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:24:08,259 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:24:08,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:24:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:24:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:24:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:24:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:24:08,263 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 23:24:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:08,264 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:24:08,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:24:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:24:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:24:08,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:08,264 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 23:24:08,264 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:08,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 23:24:08,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:08,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:08,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:08,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:08,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:08,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:08,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:08,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:08,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:08,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:08,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:08,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:24:08,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:24:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:24:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:24:08,868 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 23:24:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:08,980 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:24:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:24:08,980 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 23:24:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:08,981 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:24:08,981 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:24:08,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:24:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:24:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:24:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:24:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:24:08,987 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 23:24:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:08,987 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:24:08,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:24:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:24:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:24:08,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:08,988 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 23:24:08,988 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:08,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 23:24:08,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:08,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:08,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:08,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:09,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:09,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:09,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:09,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:24:09,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:09,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:09,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:09,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:24:09,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:24:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:24:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:24:09,566 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 23:24:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:09,636 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:24:09,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:24:09,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 23:24:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:09,638 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:24:09,638 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:24:09,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:24:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:24:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:24:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:24:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:24:09,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 23:24:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:09,642 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:24:09,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:24:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:24:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:24:09,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:09,643 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 23:24:09,643 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:09,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 23:24:09,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:09,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:09,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:09,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:09,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:10,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:10,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:10,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:10,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:10,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:10,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:10,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:10,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:24:10,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:24:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:24:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:24:10,488 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 23:24:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:10,648 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:24:10,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:24:10,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 23:24:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:10,650 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:24:10,650 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:24:10,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:24:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:24:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:24:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:24:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:24:10,654 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 23:24:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:10,654 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:24:10,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:24:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:24:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:24:10,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:10,655 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 23:24:10,656 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:10,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 23:24:10,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:10,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:11,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:11,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:11,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:11,369 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:24:11,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:11,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:11,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:11,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:24:11,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:24:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:24:11,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:24:11,417 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 23:24:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:11,485 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:24:11,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:24:11,486 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 23:24:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:11,487 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:24:11,487 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:24:11,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:24:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:24:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:24:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:24:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:24:11,491 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 23:24:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:11,491 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:24:11,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:24:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:24:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:24:11,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:11,492 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 23:24:11,492 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:11,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 23:24:11,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:11,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:11,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:12,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:12,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:12,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:12,125 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:24:12,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:12,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:12,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:12,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:24:12,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:24:12,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:24:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:24:12,163 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 23:24:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:12,222 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:24:12,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:24:12,224 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 23:24:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:12,225 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:24:12,225 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:24:12,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:24:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:24:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:24:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:24:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:24:12,228 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 23:24:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:12,228 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:24:12,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:24:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:24:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:24:12,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:12,229 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 23:24:12,229 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:12,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 23:24:12,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:12,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:12,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:12,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:12,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:13,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:13,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:13,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:13,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:13,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:24:13,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:24:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:24:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:24:13,242 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 23:24:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:13,300 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:24:13,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:24:13,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 23:24:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:13,302 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:24:13,302 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:24:13,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:24:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:24:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:24:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:24:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:24:13,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 23:24:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:13,306 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:24:13,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:24:13,306 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:24:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:24:13,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:13,306 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 23:24:13,306 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:13,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 23:24:13,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:13,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:13,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:13,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:14,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:14,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:14,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:14,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:14,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:14,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:24:14,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:24:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:24:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:24:14,246 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 23:24:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:14,323 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:24:14,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:24:14,324 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 23:24:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:14,325 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:24:14,325 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:24:14,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:24:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:24:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:24:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:24:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:24:14,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 23:24:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:14,330 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:24:14,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:24:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:24:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:24:14,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:14,331 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 23:24:14,331 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:14,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 23:24:14,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:14,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:14,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:14,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:15,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:15,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:15,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:24:15,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:15,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:15,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:24:15,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:24:15,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:24:15,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:24:15,834 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 23:24:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:15,943 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:24:15,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:24:15,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 23:24:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:15,944 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:24:15,944 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:24:15,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:24:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:24:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:24:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:24:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:24:15,947 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 23:24:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,948 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:24:15,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:24:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:24:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:24:15,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,948 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 23:24:15,948 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 23:24:15,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:16,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:16,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:16,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:16,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:16,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:16,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:16,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:16,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:24:16,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:24:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:24:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:24:16,827 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 23:24:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:16,895 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:24:16,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:24:16,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 23:24:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:16,897 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:24:16,897 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:24:16,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:24:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:24:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:24:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:24:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:24:16,902 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 23:24:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:16,902 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:24:16,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:24:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:24:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:24:16,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:16,903 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 23:24:16,904 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:16,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 23:24:16,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:16,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:16,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:17,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:17,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:17,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:18,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:24:18,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:18,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:18,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:18,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:24:18,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:24:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:24:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:24:18,085 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 23:24:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:18,175 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:24:18,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:24:18,175 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 23:24:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:18,176 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:24:18,176 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:24:18,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:24:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:24:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:24:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:24:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:24:18,180 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 23:24:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:18,181 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:24:18,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:24:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:24:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:24:18,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:18,181 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 23:24:18,181 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:18,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 23:24:18,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:18,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:18,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:18,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:18,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:19,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:19,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:19,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:19,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:24:19,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:19,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:19,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:19,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:24:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:24:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:24:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:24:19,140 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 23:24:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:19,209 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:24:19,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:24:19,209 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 23:24:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:19,210 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:24:19,211 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:24:19,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:24:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:24:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:24:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:24:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:24:19,215 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 23:24:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:19,215 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:24:19,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:24:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:24:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:24:19,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:19,216 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 23:24:19,216 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:19,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 23:24:19,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:19,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:19,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:19,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:19,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:20,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:20,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:20,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:24:20,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:24:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:24:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:24:20,272 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 23:24:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:21,287 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:24:21,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:24:21,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 23:24:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:21,289 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:24:21,289 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:24:21,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:24:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:24:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:24:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:24:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:24:21,293 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 23:24:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:21,293 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:24:21,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:24:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:24:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:24:21,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:21,294 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 23:24:21,294 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:21,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 23:24:21,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:21,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:21,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:21,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:22,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:22,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:22,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:22,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:22,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:22,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:24:22,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:24:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:24:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:24:22,790 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 23:24:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:23,098 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:24:23,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:24:23,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 23:24:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:23,100 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:24:23,100 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:24:23,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:24:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:24:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:24:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:24:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:24:23,104 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 23:24:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:23,105 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:24:23,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:24:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:24:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:24:23,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:23,105 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 23:24:23,105 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:23,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 23:24:23,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:23,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:23,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:23,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:24,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:24,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:24,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:24,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:24:24,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:24,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:24,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:24,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:24:24,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:24:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:24:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:24:24,113 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 23:24:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:24,199 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:24:24,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:24:24,199 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 23:24:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:24,201 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:24:24,201 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:24:24,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:24:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:24:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:24:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:24:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:24:24,205 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 23:24:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:24,205 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:24:24,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:24:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:24:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:24:24,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:24,206 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 23:24:24,206 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:24,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:24,207 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 23:24:24,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:24,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:24,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:24,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:24,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:25,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:25,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:25,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:25,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:25,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:25,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:25,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:25,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:24:25,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:24:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:24:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:24:25,325 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 23:24:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:25,407 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:24:25,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:24:25,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 23:24:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:25,408 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:24:25,408 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:24:25,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:24:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:24:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:24:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:24:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:24:25,411 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 23:24:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:25,412 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:24:25,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:24:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:24:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:24:25,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:25,412 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 23:24:25,413 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:25,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 23:24:25,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:25,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:25,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:25,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:26,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:26,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:26,412 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:26,454 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:24:26,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:26,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:26,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:26,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:24:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:24:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:24:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:24:26,500 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 23:24:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:26,607 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:24:26,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:24:26,607 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 23:24:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:26,609 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:24:26,609 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:24:26,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:24:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:24:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:24:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:24:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:24:26,613 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 23:24:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:26,614 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:24:26,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:24:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:24:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:24:26,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:26,615 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 23:24:26,615 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:26,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 23:24:26,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:26,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:26,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:26,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:26,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:28,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:28,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:28,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:28,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:24:28,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:28,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:28,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:28,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:24:28,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:24:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:24:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:24:28,977 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 23:24:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:29,096 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:24:29,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:24:29,097 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 23:24:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:29,098 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:24:29,098 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:24:29,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:24:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:24:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:24:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:24:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:24:29,102 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 23:24:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:29,103 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:24:29,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:24:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:24:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:24:29,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:29,103 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 23:24:29,104 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:29,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:29,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 23:24:29,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:29,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:29,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:29,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:29,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:30,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:30,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:30,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:30,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:24:30,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:24:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:24:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:24:30,179 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 23:24:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:30,285 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:24:30,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:24:30,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 23:24:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:30,286 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:24:30,286 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:24:30,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:24:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:24:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:24:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:24:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:24:30,291 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 23:24:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:30,291 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:24:30,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:24:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:24:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:24:30,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:30,292 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 23:24:30,293 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:30,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 23:24:30,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:30,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:30,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:30,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:31,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:31,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:31,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:31,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:31,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:31,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:31,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:31,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:24:31,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:24:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:24:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:24:31,615 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 23:24:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:31,958 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:24:31,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:24:31,959 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 23:24:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:31,960 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:24:31,961 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:24:31,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:24:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:24:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:24:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:24:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:24:31,965 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 23:24:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:31,965 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:24:31,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:24:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:24:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:24:31,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:31,966 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 23:24:31,966 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:31,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:31,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 23:24:31,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:31,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:31,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:31,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:31,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:33,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:33,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:33,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:33,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:24:33,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:33,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:33,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:33,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:24:33,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:24:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:24:33,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:24:33,915 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 23:24:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:34,076 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:24:34,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:24:34,077 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 23:24:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:34,078 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:24:34,078 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:24:34,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:24:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:24:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:24:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:24:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:24:34,081 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 23:24:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:34,081 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:24:34,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:24:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:24:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:24:34,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:34,082 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 23:24:34,082 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:34,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 23:24:34,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:34,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:34,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:34,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:35,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:35,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:35,532 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:35,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:35,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:35,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:24:35,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:24:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:24:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:24:35,591 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 23:24:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:35,785 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:24:35,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:24:35,786 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 23:24:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:35,787 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:24:35,787 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:24:35,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:24:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:24:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:24:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:24:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:24:35,791 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 23:24:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:35,791 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:24:35,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:24:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:24:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:24:35,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:35,792 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 23:24:35,792 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:35,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:35,793 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 23:24:35,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:35,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:35,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:35,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:37,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:37,114 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:37,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:24:37,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:37,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:37,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:37,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:24:37,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:24:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:24:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:24:37,223 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 23:24:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:37,401 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:24:37,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:24:37,402 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 23:24:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:37,403 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:24:37,403 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:24:37,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:24:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:24:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:24:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:24:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:24:37,406 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 23:24:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:37,406 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:24:37,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:24:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:24:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:24:37,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:37,407 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 23:24:37,407 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:37,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 23:24:37,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:37,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:37,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:37,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:37,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:38,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:38,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:38,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:38,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:24:38,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:38,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:39,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:39,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:24:39,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:24:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:24:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:24:39,027 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 23:24:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:39,322 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:24:39,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:24:39,322 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 23:24:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:39,323 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:24:39,323 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:24:39,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:24:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:24:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:24:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:24:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:24:39,327 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 23:24:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:39,328 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:24:39,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:24:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:24:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:24:39,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:39,329 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 23:24:39,329 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:39,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 23:24:39,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:39,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:39,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:39,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:41,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:41,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:41,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:42,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:42,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:42,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:24:42,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:24:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:24:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:24:42,086 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 23:24:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:42,738 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:24:42,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:24:42,738 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 23:24:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:42,739 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:24:42,739 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:24:42,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:24:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:24:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:24:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:24:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:24:42,743 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 23:24:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:42,744 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:24:42,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:24:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:24:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:24:42,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:42,745 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 23:24:42,745 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:42,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 23:24:42,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:42,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:42,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:44,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:44,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:44,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:44,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:44,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:44,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:44,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:44,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:24:44,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:24:44,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:24:44,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:24:44,485 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 23:24:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:44,721 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:24:44,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:24:44,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 23:24:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:44,722 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:24:44,722 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:24:44,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:24:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:24:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:24:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:24:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:24:44,726 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 23:24:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:44,726 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:24:44,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:24:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:24:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:24:44,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:44,727 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 23:24:44,727 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:44,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 23:24:44,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:44,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:44,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:46,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:46,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:46,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:46,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 23:24:46,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:46,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:46,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:46,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:24:46,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:24:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:24:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:24:46,200 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 23:24:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:46,380 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:24:46,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:24:46,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 23:24:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:46,381 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:24:46,381 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:24:46,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:24:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:24:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:24:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:24:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:24:46,385 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 23:24:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:46,385 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:24:46,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:24:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:24:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:24:46,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:46,386 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 23:24:46,386 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:46,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:46,386 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 23:24:46,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:46,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:46,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:46,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:47,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:47,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:47,799 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:47,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:47,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:47,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:47,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:24:47,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:24:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:24:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:24:47,864 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 23:24:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:49,117 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:24:49,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:24:49,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 23:24:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:49,119 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:24:49,119 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:24:49,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:24:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:24:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:24:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:24:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:24:49,123 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 23:24:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:24:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:24:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:24:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:24:49,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:49,124 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 23:24:49,124 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:49,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 23:24:49,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:49,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:49,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:49,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:49,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:50,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:50,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:50,620 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:50,673 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 23:24:50,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:50,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:50,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:50,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:24:50,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:24:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:24:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:24:50,734 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 23:24:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:50,972 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:24:50,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:24:50,972 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 23:24:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:50,973 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:24:50,973 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:24:50,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:24:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:24:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:24:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:24:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 23:24:50,976 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 23:24:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:50,977 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 23:24:50,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:24:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 23:24:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:24:50,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:50,978 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 23:24:50,978 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:50,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 23:24:50,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:50,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:50,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:53,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:53,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:53,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:53,146 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:24:53,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:53,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:53,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:53,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:24:53,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:24:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:24:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:24:53,199 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 23:24:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:53,318 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:24:53,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:24:53,318 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 23:24:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:53,319 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:24:53,319 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:24:53,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:24:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:24:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:24:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:24:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:24:53,323 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 23:24:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:53,323 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:24:53,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:24:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:24:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:24:53,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:53,324 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 23:24:53,324 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:53,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 23:24:53,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:53,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:53,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:53,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:53,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:55,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:55,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:55,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:55,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:55,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:55,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:24:55,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:24:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:24:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:24:55,169 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 23:24:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:55,328 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:24:55,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:24:55,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 23:24:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:55,329 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:24:55,329 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:24:55,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:24:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:24:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:24:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:24:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 23:24:55,332 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 23:24:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:55,332 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 23:24:55,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:24:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 23:24:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:24:55,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:55,333 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 23:24:55,333 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:55,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 23:24:55,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:55,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:56,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:56,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:56,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:56,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:56,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:56,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:56,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:56,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:24:56,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:24:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:24:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:24:56,880 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 23:24:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:56,982 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:24:56,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:24:56,982 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 23:24:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:56,983 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:24:56,983 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:24:56,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:24:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:24:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:24:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:24:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:24:56,987 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 23:24:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:56,988 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:24:56,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:24:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:24:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:24:56,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:56,988 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 23:24:56,989 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:56,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 23:24:56,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:56,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:56,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:56,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:56,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:58,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:58,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:58,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:58,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:24:58,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:58,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:58,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:58,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:24:58,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:24:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:24:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:24:58,743 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 23:24:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:58,974 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:24:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:24:58,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 23:24:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:58,975 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:24:58,975 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:24:58,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:24:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:24:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:24:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:24:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 23:24:58,979 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 23:24:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:58,980 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 23:24:58,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:24:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 23:24:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:24:58,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:58,981 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 23:24:58,981 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:58,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 23:24:58,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:58,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:58,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:58,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:58,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:00,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:00,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:00,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:00,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:00,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:00,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:00,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:00,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:25:00,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:25:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:25:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:25:00,676 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 23:25:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:00,778 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:25:00,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:25:00,779 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 23:25:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:00,780 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:25:00,780 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:25:00,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:25:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:25:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:25:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:25:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:25:00,784 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 23:25:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:00,784 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:25:00,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:25:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:25:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:25:00,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:00,785 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 23:25:00,786 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:00,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 23:25:00,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:00,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:00,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:02,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:02,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:02,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:25:02,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:02,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:02,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:25:02,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:25:02,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:25:02,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:25:02,668 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 23:25:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:03,589 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:25:03,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:25:03,589 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 23:25:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:03,590 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:25:03,590 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:25:03,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:25:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:25:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:25:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:25:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 23:25:03,594 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 23:25:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:03,594 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 23:25:03,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:25:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 23:25:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:25:03,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:03,595 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 23:25:03,595 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:03,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:03,596 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 23:25:03,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:03,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:03,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:03,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:03,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:05,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:05,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:05,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:05,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:25:05,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:05,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:05,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:05,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:25:05,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:25:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:25:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:25:05,759 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 23:25:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:06,005 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:25:06,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:25:06,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 23:25:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:06,006 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:25:06,006 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:25:06,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:25:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:25:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:25:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:25:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:25:06,011 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 23:25:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:06,011 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:25:06,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:25:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:25:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:25:06,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:06,012 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 23:25:06,012 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:06,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 23:25:06,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:06,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:06,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:06,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:06,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:07,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:07,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:07,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:07,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:07,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:07,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:25:07,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:25:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:25:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:25:07,849 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 23:25:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:07,958 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:25:07,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:25:07,959 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 23:25:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:07,960 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:25:07,960 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:25:07,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:25:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:25:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:25:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:25:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 23:25:07,963 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 23:25:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:07,964 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 23:25:07,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:25:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 23:25:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:25:07,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:07,964 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 23:25:07,965 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:07,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 23:25:07,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:07,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:07,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:07,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:07,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:10,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:10,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:10,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:10,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:10,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:10,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:10,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:10,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:25:10,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:25:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:25:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:25:10,216 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 23:25:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:10,320 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:25:10,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:25:10,320 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 23:25:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:10,321 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:25:10,321 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:25:10,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:25:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:25:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:25:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:25:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:25:10,324 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 23:25:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:10,324 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:25:10,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:25:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:25:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:25:10,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:10,325 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 23:25:10,325 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:10,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 23:25:10,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:10,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:10,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:10,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:10,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:12,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:12,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:12,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:12,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:25:12,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:12,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:12,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:12,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:25:12,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:25:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:25:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:25:12,305 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 23:25:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:12,655 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:25:12,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:25:12,655 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 23:25:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:12,656 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:25:12,656 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:25:12,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:25:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:25:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:25:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:25:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 23:25:12,660 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 23:25:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:12,661 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 23:25:12,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:25:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 23:25:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:25:12,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:12,662 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 23:25:12,662 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:12,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 23:25:12,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:12,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:12,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:12,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:12,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:14,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:14,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:14,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:14,793 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:14,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:14,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:14,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:14,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:25:14,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:25:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:25:14,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:25:14,860 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 23:25:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:15,063 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:25:15,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:25:15,064 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 23:25:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:15,065 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:25:15,065 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:25:15,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:25:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:25:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:25:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:25:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:25:15,069 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 23:25:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:15,069 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:25:15,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:25:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:25:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:25:15,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:15,070 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 23:25:15,070 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:15,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 23:25:15,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:15,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:15,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:15,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:17,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:17,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:17,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:17,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 23:25:17,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:17,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:17,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:17,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:25:17,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:25:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:25:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:25:17,580 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 23:25:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:17,794 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:25:17,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:25:17,794 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 23:25:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:17,795 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:25:17,796 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:25:17,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:25:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:25:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:25:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:25:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 23:25:17,799 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 23:25:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 23:25:17,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:25:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 23:25:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:25:17,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:17,801 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 23:25:17,801 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:17,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 23:25:17,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:17,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:17,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:17,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:17,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:20,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:20,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:20,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:20,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:25:20,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:20,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:20,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:20,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:25:20,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:25:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:25:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:25:20,387 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 23:25:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:20,521 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:25:20,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:25:20,522 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 23:25:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:20,523 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:25:20,524 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:25:20,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:25:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:25:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:25:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:25:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:25:20,528 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 23:25:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:20,529 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:25:20,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:25:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:25:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:25:20,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:20,530 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 23:25:20,530 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:20,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 23:25:20,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:20,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:20,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:20,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:22,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:22,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:22,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:22,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:22,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:22,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:25:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:25:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:25:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:25:22,652 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 23:25:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:22,840 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:25:22,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:25:22,840 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 23:25:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:22,841 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:25:22,841 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:25:22,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:25:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:25:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:25:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:25:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 23:25:22,845 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 23:25:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:22,845 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 23:25:22,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:25:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 23:25:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:25:22,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:22,846 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 23:25:22,846 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:22,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 23:25:22,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:22,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:22,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:25,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:25,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:25,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:25,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:25,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:25,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:25,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:25,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:25:25,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:25:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:25:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:25:25,555 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 23:25:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:25,759 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:25:25,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:25:25,759 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 23:25:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:25,760 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:25:25,760 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:25:25,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:25:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:25:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:25:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:25:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:25:25,763 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 23:25:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:25,763 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:25:25,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:25:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:25:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:25:25,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:25,764 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 23:25:25,764 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:25,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 23:25:25,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:25,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:25,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:25,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:25,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:27,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:27,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:27,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:27,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:25:27,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:27,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:27,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:27,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:25:27,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:25:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:25:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:25:27,990 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 23:25:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:28,197 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:25:28,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:25:28,197 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 23:25:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:28,198 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:25:28,198 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:25:28,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:25:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:25:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:25:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:25:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 23:25:28,201 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 23:25:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:28,201 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 23:25:28,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:25:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 23:25:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:25:28,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:28,202 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 23:25:28,202 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:28,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 23:25:28,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:28,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:28,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:28,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:28,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:30,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:30,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:30,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:30,645 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:30,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:30,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:30,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:30,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:25:30,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:25:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:25:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:25:30,696 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 23:25:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:30,911 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:25:30,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:25:30,912 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 23:25:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:30,913 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:25:30,913 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:25:30,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:25:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:25:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:25:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:25:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:25:30,916 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 23:25:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:30,916 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:25:30,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:25:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:25:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:25:30,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:30,917 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 23:25:30,917 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:30,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 23:25:30,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:30,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:30,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:30,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:33,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:33,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:33,104 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:33,184 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:25:33,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:33,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:33,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:33,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:25:33,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:25:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:25:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:25:33,235 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 23:25:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:33,724 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:25:33,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:25:33,725 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 23:25:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:33,726 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:25:33,726 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:25:33,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:25:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:25:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:25:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:25:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 23:25:33,730 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 23:25:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:33,730 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 23:25:33,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:25:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 23:25:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:25:33,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:33,732 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 23:25:33,732 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:33,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 23:25:33,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:33,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:33,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:33,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:33,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:37,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:37,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:37,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:37,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:25:37,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:37,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:37,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:37,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:25:37,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:25:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:25:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:25:37,232 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 23:25:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:37,385 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:25:37,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:25:37,385 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 23:25:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:37,386 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:25:37,386 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:25:37,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:25:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:25:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:25:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:25:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:25:37,390 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 23:25:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:37,391 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:25:37,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:25:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:25:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:25:37,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:37,392 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 23:25:37,392 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:37,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 23:25:37,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:37,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:37,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:37,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:39,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:39,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:39,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:39,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:40,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:40,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:25:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:25:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:25:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:25:40,036 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 23:25:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:40,260 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:25:40,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:25:40,261 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 23:25:40,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:40,262 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:25:40,262 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:25:40,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:25:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:25:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:25:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:25:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 23:25:40,265 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 23:25:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:40,266 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 23:25:40,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:25:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 23:25:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:25:40,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:40,267 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 23:25:40,267 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:40,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 23:25:40,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:40,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:40,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:40,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:40,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:42,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:42,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:42,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:42,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:42,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:42,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:42,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:42,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:25:42,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:25:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:25:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:25:42,765 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 23:25:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:42,922 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:25:42,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:25:42,923 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 23:25:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:42,924 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:25:42,924 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:25:42,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:25:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:25:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:25:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:25:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:25:42,928 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 23:25:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:42,928 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:25:42,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:25:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:25:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:25:42,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:42,929 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 23:25:42,929 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:42,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 23:25:42,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:42,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:42,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:45,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:45,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:45,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 23:25:45,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:45,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:45,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:25:45,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:25:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:25:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:25:45,832 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 23:25:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:46,007 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:25:46,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:25:46,008 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 23:25:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:46,009 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:25:46,009 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:25:46,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:25:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:25:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:25:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:25:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 23:25:46,013 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 23:25:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:46,013 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 23:25:46,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:25:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 23:25:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:25:46,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:46,014 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 23:25:46,014 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:46,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 23:25:46,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:46,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:46,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:46,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:48,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:48,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:48,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:48,549 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:48,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:48,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:48,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:48,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:25:48,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:25:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:25:48,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:25:48,622 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 23:25:48,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:48,905 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:25:48,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:25:48,905 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 23:25:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:48,906 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:25:48,906 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:25:48,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:25:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:25:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:25:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:25:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:25:48,909 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 23:25:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:48,910 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:25:48,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:25:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:25:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:25:48,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:48,911 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 23:25:48,911 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:48,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 23:25:48,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:48,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:48,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:51,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:51,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:51,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:51,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 23:25:51,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:51,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:51,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:51,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:25:51,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:25:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:25:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:25:51,935 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 23:25:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:52,196 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:25:52,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:25:52,197 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 23:25:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:52,197 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:25:52,197 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:25:52,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:25:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:25:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:25:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:25:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 23:25:52,201 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 23:25:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:52,202 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 23:25:52,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:25:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 23:25:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:25:52,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:52,203 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 23:25:52,203 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:52,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 23:25:52,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:52,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:52,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:52,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:54,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:54,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:54,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:55,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:25:55,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:55,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:55,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:55,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:25:55,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:25:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:25:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:25:55,113 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 23:25:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:55,571 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:25:55,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:25:55,571 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 23:25:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:55,572 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:25:55,572 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:25:55,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:25:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:25:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:25:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:25:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:25:55,578 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 23:25:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:55,578 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:25:55,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:25:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:25:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:25:55,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:55,584 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 23:25:55,584 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:55,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 23:25:55,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:55,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:55,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:55,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:55,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:58,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:58,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:58,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:58,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:25:58,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:25:58,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:25:58,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:25:58,419 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 23:25:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:58,669 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 23:25:58,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:25:58,669 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 23:25:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:58,670 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:25:58,670 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:25:58,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:25:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:25:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:25:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:25:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 23:25:58,675 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 23:25:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:58,675 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 23:25:58,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:25:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 23:25:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:25:58,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:58,676 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 23:25:58,677 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:58,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 23:25:58,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:58,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:58,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:58,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:58,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:01,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:01,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:01,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:01,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:01,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:01,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:01,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:01,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:26:01,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:26:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:26:01,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:26:01,720 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 23:26:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:01,863 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 23:26:01,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:26:01,864 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 23:26:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:01,865 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:26:01,865 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:26:01,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:26:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:26:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:26:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:26:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 23:26:01,869 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 23:26:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:01,870 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 23:26:01,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:26:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 23:26:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:26:01,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:01,871 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 23:26:01,871 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:01,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 23:26:01,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:01,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:01,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:01,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:01,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:04,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:04,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:04,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:04,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:26:04,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:04,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:04,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:04,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:26:04,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:26:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:26:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:26:04,822 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 23:26:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:05,134 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 23:26:05,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:26:05,134 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 23:26:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:05,135 INFO L225 Difference]: With dead ends: 183 [2018-09-30 23:26:05,135 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:26:05,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:26:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:26:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:26:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:26:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 23:26:05,138 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 23:26:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:05,138 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 23:26:05,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:26:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 23:26:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:26:05,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:05,139 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 23:26:05,139 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:05,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:05,140 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 23:26:05,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:05,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:05,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:05,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:05,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:08,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:08,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:08,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:08,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:08,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:08,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:08,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:08,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:26:08,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:26:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:26:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:26:08,291 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 23:26:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:08,465 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 23:26:08,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:26:08,465 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 23:26:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:08,467 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:26:08,467 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:26:08,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:26:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:26:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:26:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:26:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 23:26:08,471 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 23:26:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:08,471 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 23:26:08,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:26:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 23:26:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:26:08,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:08,472 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 23:26:08,472 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:08,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 23:26:08,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:08,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:08,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:08,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:08,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:11,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:11,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:11,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 23:26:11,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:11,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:11,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:26:11,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:26:11,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:26:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:26:11,894 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 23:26:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:12,208 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 23:26:12,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:26:12,209 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 23:26:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:12,209 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:26:12,210 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:26:12,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:26:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:26:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:26:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:26:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 23:26:12,214 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 23:26:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:12,214 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 23:26:12,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:26:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 23:26:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:26:12,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:12,215 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 23:26:12,215 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:12,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 23:26:12,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:12,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:12,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:12,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:15,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:15,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:15,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:15,515 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 23:26:15,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:15,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:15,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:15,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:26:15,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:26:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:26:15,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:26:15,570 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 23:26:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:15,811 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 23:26:15,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:26:15,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 23:26:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:15,812 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:26:15,812 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:26:15,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:26:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:26:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:26:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:26:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 23:26:15,816 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 23:26:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:15,817 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 23:26:15,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:26:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 23:26:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:26:15,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:15,818 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 23:26:15,818 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:15,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 23:26:15,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:15,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:15,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:15,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:15,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:18,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:18,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:18,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:18,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:18,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:18,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:26:18,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:26:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:26:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:26:18,974 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 23:26:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:19,160 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 23:26:19,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:26:19,160 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 23:26:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:19,161 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:26:19,161 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:26:19,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:26:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:26:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:26:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:26:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 23:26:19,165 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 23:26:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:19,166 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 23:26:19,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:26:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 23:26:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:26:19,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:19,167 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 23:26:19,167 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:19,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 23:26:19,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:19,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:19,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:19,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:19,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:23,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:23,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:23,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:23,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:23,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:23,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:23,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:23,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:26:23,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:26:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:26:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:26:23,274 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 23:26:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:23,436 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 23:26:23,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:26:23,436 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 23:26:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:23,437 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:26:23,437 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:26:23,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:26:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:26:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:26:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:26:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 23:26:23,441 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 23:26:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:23,441 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 23:26:23,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:26:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 23:26:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:26:23,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:23,442 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 23:26:23,442 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:23,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:23,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 23:26:23,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:23,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:23,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:23,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:23,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:27,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:27,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:27,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:27,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 23:26:27,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:27,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:27,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:27,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:26:27,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:26:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:26:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:26:27,208 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 23:26:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:27,408 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 23:26:27,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:26:27,408 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 23:26:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:27,409 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:26:27,409 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:26:27,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:26:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:26:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:26:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:26:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 23:26:27,413 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 23:26:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:27,413 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 23:26:27,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:26:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 23:26:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:26:27,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:27,414 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 23:26:27,414 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:27,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 23:26:27,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:27,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:27,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:30,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:30,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:30,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:30,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:30,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:30,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:30,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:30,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:26:30,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:26:30,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:26:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:26:30,832 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 23:26:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:31,113 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 23:26:31,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:26:31,114 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 23:26:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:31,114 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:26:31,114 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:26:31,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:26:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:26:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:26:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:26:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 23:26:31,118 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 23:26:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:31,118 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 23:26:31,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:26:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 23:26:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:26:31,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:31,119 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 23:26:31,119 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:31,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 23:26:31,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:31,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:31,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:31,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:31,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:34,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:34,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:34,429 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:34,538 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 23:26:34,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:34,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:34,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:34,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:26:34,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:26:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:26:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:26:34,599 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 23:26:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:34,905 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 23:26:34,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:26:34,905 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 23:26:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:34,906 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:26:34,906 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:26:34,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:26:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:26:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:26:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:26:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 23:26:34,910 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 23:26:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:34,910 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 23:26:34,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:26:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 23:26:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:26:34,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:34,912 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 23:26:34,912 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:34,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 23:26:34,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:34,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:34,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:38,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:38,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:38,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:38,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 23:26:38,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:38,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:38,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:38,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:26:38,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:26:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:26:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:26:38,695 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 23:26:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:38,894 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 23:26:38,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:26:38,894 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 23:26:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:38,895 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:26:38,895 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:26:38,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:26:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:26:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:26:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:26:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 23:26:38,899 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 23:26:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:38,899 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 23:26:38,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:26:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 23:26:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:26:38,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:38,900 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 23:26:38,900 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:38,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 23:26:38,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:38,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:38,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:38,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:38,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:42,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:42,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:42,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:42,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:42,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:42,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:26:42,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:26:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:26:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:26:42,675 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 23:26:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:42,988 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 23:26:42,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:26:42,988 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 23:26:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:42,989 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:26:42,989 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:26:42,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:26:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:26:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:26:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:26:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 23:26:42,993 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 23:26:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:42,993 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 23:26:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:26:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 23:26:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:26:42,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:42,994 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 23:26:42,994 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:42,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 23:26:42,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:42,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:42,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:42,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:42,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:46,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:46,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:46,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:46,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:46,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:46,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:46,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:46,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:26:46,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:26:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:26:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:26:46,853 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 23:26:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:47,161 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 23:26:47,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:26:47,162 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 23:26:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:47,163 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:26:47,163 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:26:47,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:26:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:26:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:26:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:26:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 23:26:47,166 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 23:26:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:47,167 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 23:26:47,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:26:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 23:26:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:26:47,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:47,168 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 23:26:47,168 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:47,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 23:26:47,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:47,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:47,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:47,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:47,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:50,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:50,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:50,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:50,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 23:26:50,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:50,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:50,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:50,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:26:50,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:26:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:26:50,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:26:50,947 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 23:26:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:51,206 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 23:26:51,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:26:51,206 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 23:26:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:51,207 INFO L225 Difference]: With dead ends: 207 [2018-09-30 23:26:51,207 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:26:51,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:26:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:26:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:26:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:26:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 23:26:51,211 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 23:26:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:51,212 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 23:26:51,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:26:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 23:26:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:26:51,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:51,212 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 23:26:51,213 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:51,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 23:26:51,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:51,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:51,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:51,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:51,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:54,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:54,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:54,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:55,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:55,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:55,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:55,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:55,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:26:55,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:26:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:26:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:26:55,088 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 23:26:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:55,308 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 23:26:55,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:26:55,308 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 23:26:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:55,309 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:26:55,310 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:26:55,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:26:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:26:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 23:26:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:26:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 23:26:55,314 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 23:26:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:55,314 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 23:26:55,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:26:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 23:26:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:26:55,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:55,316 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 23:26:55,316 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:55,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 23:26:55,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:55,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:55,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:55,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:59,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:59,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:59,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:59,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 23:26:59,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:59,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:59,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:59,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:26:59,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:26:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:26:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:26:59,685 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 23:26:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:59,943 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 23:26:59,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:26:59,943 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 23:26:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:59,944 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:26:59,945 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:26:59,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:26:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:26:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:26:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:26:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 23:26:59,948 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 23:26:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:59,948 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 23:26:59,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:26:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 23:26:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:26:59,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:59,949 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 23:26:59,949 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:59,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 23:26:59,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:59,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:59,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:59,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:59,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:04,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:04,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:04,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:04,187 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 23:27:04,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:04,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:04,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:04,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:27:04,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:27:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:27:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:27:04,290 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 23:27:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:04,592 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 23:27:04,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:27:04,592 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 23:27:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:04,593 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:27:04,593 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:27:04,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:27:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:27:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:27:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:27:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 23:27:04,597 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 23:27:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:04,597 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 23:27:04,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:27:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 23:27:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:27:04,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:04,598 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 23:27:04,599 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:04,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 23:27:04,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:04,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:04,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:04,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:04,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:08,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:08,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:08,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:08,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:08,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:08,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:27:08,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:27:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:27:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:27:08,887 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 23:27:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:09,275 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 23:27:09,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:27:09,275 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 23:27:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:09,276 INFO L225 Difference]: With dead ends: 215 [2018-09-30 23:27:09,276 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:27:09,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:27:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:27:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:27:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:27:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 23:27:09,281 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 23:27:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:09,281 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 23:27:09,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:27:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 23:27:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:27:09,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:09,282 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 23:27:09,282 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:09,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 23:27:09,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:09,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:09,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:09,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:09,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:13,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:13,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:13,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:13,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:13,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:13,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:13,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:13,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:27:13,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:27:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:27:13,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:27:13,746 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 23:27:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:14,078 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 23:27:14,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:27:14,078 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 23:27:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:14,079 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:27:14,079 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:27:14,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:27:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:27:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 23:27:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:27:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 23:27:14,084 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 23:27:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:14,084 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 23:27:14,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:27:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 23:27:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:27:14,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:14,085 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 23:27:14,085 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:14,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 23:27:14,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:14,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:14,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:14,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:14,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:18,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:18,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:18,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:18,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 23:27:18,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:18,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:18,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:18,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:27:18,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:27:18,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:27:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:27:18,539 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 23:27:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:18,894 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 23:27:18,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:27:18,895 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 23:27:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:18,895 INFO L225 Difference]: With dead ends: 219 [2018-09-30 23:27:18,895 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:27:18,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:27:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:27:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:27:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:27:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 23:27:18,899 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 23:27:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:18,899 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 23:27:18,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:27:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 23:27:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:27:18,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:18,901 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 23:27:18,901 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:18,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 23:27:18,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:18,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:18,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:18,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:23,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:23,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:23,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:23,463 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:23,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:23,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:23,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:23,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:27:23,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:27:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:27:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:27:23,530 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 23:27:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:23,830 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 23:27:23,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:27:23,830 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 23:27:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:23,831 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:27:23,831 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:27:23,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:27:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:27:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:27:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:27:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 23:27:23,834 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 23:27:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:23,834 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 23:27:23,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:27:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 23:27:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:27:23,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:23,835 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 23:27:23,835 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:23,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 23:27:23,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:23,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:23,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:23,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:23,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:28,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:28,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:28,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:28,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 23:27:28,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:28,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:28,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:28,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:27:28,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:27:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:27:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:27:28,514 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 23:27:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:28,845 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 23:27:28,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:27:28,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 23:27:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:28,846 INFO L225 Difference]: With dead ends: 223 [2018-09-30 23:27:28,846 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:27:28,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:27:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:27:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:27:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:27:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 23:27:28,852 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 23:27:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:28,852 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 23:27:28,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:27:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 23:27:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:27:28,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:28,853 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 23:27:28,853 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:28,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 23:27:28,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:28,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:28,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:28,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:28,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:33,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:33,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:33,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:33,550 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 23:27:33,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:33,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:33,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:33,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:27:33,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:27:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:27:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:27:33,619 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 23:27:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:34,015 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 23:27:34,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:27:34,016 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 23:27:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:34,016 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:27:34,016 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:27:34,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:27:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:27:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 23:27:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:27:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 23:27:34,021 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 23:27:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:34,021 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 23:27:34,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:27:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 23:27:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:27:34,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:34,022 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 23:27:34,022 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:34,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 23:27:34,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:34,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:34,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:34,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:34,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:38,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:38,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:38,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:38,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:38,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:38,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:27:38,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:27:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:27:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:27:38,870 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 23:27:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:39,299 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 23:27:39,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:27:39,299 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 23:27:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:39,300 INFO L225 Difference]: With dead ends: 227 [2018-09-30 23:27:39,300 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 23:27:39,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:27:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 23:27:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 23:27:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:27:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 23:27:39,303 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 23:27:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:39,303 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 23:27:39,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:27:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 23:27:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:27:39,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:39,304 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 23:27:39,304 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:39,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:39,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 23:27:39,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:39,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:39,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:39,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:39,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:43,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:43,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:44,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:44,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:44,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:44,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:44,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:27:44,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:27:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:27:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:27:44,119 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 23:27:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:44,549 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 23:27:44,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:27:44,549 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 23:27:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:44,549 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:27:44,550 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:27:44,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:27:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:27:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:27:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:27:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 23:27:44,553 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 23:27:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:44,553 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 23:27:44,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:27:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 23:27:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:27:44,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:44,554 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 23:27:44,554 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:44,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 23:27:44,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:44,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:44,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:44,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:44,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:49,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:49,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:49,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:49,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 23:27:49,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:49,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:49,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:49,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:27:49,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:27:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:27:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:27:49,636 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-30 23:27:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:49,938 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-30 23:27:49,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:27:49,938 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 23:27:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:49,939 INFO L225 Difference]: With dead ends: 231 [2018-09-30 23:27:49,939 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:27:49,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:27:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:27:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:27:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:27:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-30 23:27:49,943 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-30 23:27:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:49,943 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-30 23:27:49,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:27:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-30 23:27:49,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:27:49,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:49,944 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-30 23:27:49,944 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:49,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-30 23:27:49,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:49,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:49,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:49,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:49,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:54,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:54,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:54,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:54,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:54,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:54,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:54,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:54,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:27:54,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:27:54,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:27:54,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:27:54,963 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-30 23:27:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:55,309 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 23:27:55,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:27:55,309 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-30 23:27:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:55,310 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:27:55,310 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:27:55,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:27:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:27:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 23:27:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:27:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 23:27:55,313 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-30 23:27:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:55,313 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 23:27:55,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:27:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 23:27:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:27:55,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:55,314 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-30 23:27:55,314 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:55,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-30 23:27:55,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:55,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:55,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:00,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:00,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:00,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:00,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 23:28:00,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:00,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:00,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:00,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:28:00,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:28:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:28:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:28:00,467 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-30 23:28:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:00,941 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-30 23:28:00,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:28:00,941 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 23:28:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:00,942 INFO L225 Difference]: With dead ends: 235 [2018-09-30 23:28:00,942 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 23:28:00,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:28:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 23:28:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 23:28:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:28:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-30 23:28:00,945 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-30 23:28:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:00,945 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-30 23:28:00,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:28:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-30 23:28:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:28:00,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:00,946 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-30 23:28:00,946 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:00,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-30 23:28:00,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:00,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:00,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:00,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:00,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:06,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:06,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:06,158 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 23:28:06,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:06,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:06,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:28:06,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:28:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:28:06,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:28:06,230 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-30 23:28:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:06,497 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 23:28:06,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:28:06,498 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-30 23:28:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:06,498 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:28:06,498 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:28:06,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:28:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:28:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:28:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:28:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 23:28:06,502 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-30 23:28:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:06,502 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 23:28:06,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:28:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 23:28:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:28:06,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:06,503 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-30 23:28:06,503 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:06,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-30 23:28:06,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:06,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:06,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:06,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:06,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:11,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:11,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:11,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:11,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:28:11,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:28:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:28:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:28:11,768 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-30 23:28:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:12,118 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-30 23:28:12,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:28:12,119 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 23:28:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:12,120 INFO L225 Difference]: With dead ends: 239 [2018-09-30 23:28:12,120 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:28:12,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:28:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:28:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:28:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:28:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-30 23:28:12,124 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-30 23:28:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:12,124 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-30 23:28:12,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:28:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-30 23:28:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:28:12,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:12,125 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-30 23:28:12,125 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:12,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:12,126 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-30 23:28:12,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:12,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:12,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:12,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:17,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:17,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:17,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:17,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:17,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:17,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:17,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:17,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:28:17,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:28:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:28:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:28:17,318 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-30 23:28:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:17,837 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 23:28:17,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:28:17,846 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-30 23:28:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:17,846 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:28:17,846 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:28:17,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:28:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:28:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 23:28:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:28:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 23:28:17,851 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-30 23:28:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:17,851 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 23:28:17,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:28:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 23:28:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:28:17,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:17,852 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-30 23:28:17,852 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:17,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-30 23:28:17,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:17,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:17,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:17,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:17,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:23,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:23,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:23,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:23,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 23:28:23,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:23,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:23,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:23,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:28:23,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:28:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:28:23,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:28:23,398 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-30 23:28:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:23,880 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-30 23:28:23,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:28:23,880 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 23:28:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:23,880 INFO L225 Difference]: With dead ends: 243 [2018-09-30 23:28:23,881 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:28:23,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:28:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:28:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:28:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:28:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-30 23:28:23,884 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-30 23:28:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:23,885 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-30 23:28:23,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:28:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-30 23:28:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:28:23,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:23,885 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-30 23:28:23,886 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:23,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-30 23:28:23,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:23,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:23,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:23,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:23,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:29,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:29,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:29,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:29,301 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:29,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:29,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:29,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:29,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:28:29,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:28:29,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:28:29,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:28:29,378 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-30 23:28:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:29,898 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 23:28:29,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:28:29,899 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-30 23:28:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:29,899 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:28:29,900 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:28:29,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:28:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:28:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 23:28:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:28:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 23:28:29,903 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-30 23:28:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:29,903 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 23:28:29,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:28:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 23:28:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:28:29,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:29,904 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-30 23:28:29,904 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:29,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-30 23:28:29,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:29,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:29,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:29,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:29,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:35,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:35,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:35,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:35,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 23:28:35,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:35,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:35,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:35,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:28:35,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:28:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:28:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:28:35,465 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-30 23:28:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:35,962 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-30 23:28:35,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:28:35,962 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 23:28:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:35,963 INFO L225 Difference]: With dead ends: 247 [2018-09-30 23:28:35,963 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:28:35,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:28:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:28:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:28:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:28:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-30 23:28:35,967 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-30 23:28:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:35,967 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-30 23:28:35,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:28:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-30 23:28:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:28:35,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:35,968 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-30 23:28:35,968 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:35,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-30 23:28:35,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:35,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:35,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:35,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:35,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:41,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:41,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:41,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:41,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 23:28:41,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:41,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:41,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:41,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:28:41,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:28:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:28:41,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:28:41,713 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-30 23:28:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:42,005 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 23:28:42,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:28:42,005 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-30 23:28:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:42,006 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:28:42,006 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:28:42,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:28:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:28:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 23:28:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:28:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 23:28:42,011 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-30 23:28:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:42,011 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 23:28:42,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:28:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 23:28:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:28:42,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:42,012 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-30 23:28:42,012 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:42,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-30 23:28:42,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:42,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:42,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:42,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:42,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:47,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:47,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:47,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:47,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:47,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:47,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:28:47,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:28:47,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:28:47,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:28:47,773 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-30 23:28:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:48,171 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-30 23:28:48,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:28:48,171 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 23:28:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:48,172 INFO L225 Difference]: With dead ends: 251 [2018-09-30 23:28:48,172 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:28:48,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:28:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:28:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 23:28:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:28:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-30 23:28:48,176 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-30 23:28:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:48,176 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-30 23:28:48,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:28:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-30 23:28:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:28:48,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:48,177 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-30 23:28:48,177 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:48,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-30 23:28:48,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:48,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:48,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:53,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:53,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:53,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:53,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:53,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:53,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:53,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:53,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:28:53,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:28:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:28:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:28:53,954 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-30 23:28:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:54,487 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 23:28:54,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:28:54,487 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-30 23:28:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:54,488 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:28:54,488 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:28:54,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:28:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:28:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:28:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:28:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 23:28:54,491 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-30 23:28:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:54,491 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 23:28:54,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:28:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 23:28:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:28:54,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:54,493 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-30 23:28:54,493 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:54,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-30 23:28:54,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:54,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:54,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:54,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:54,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:00,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:00,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:00,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:00,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 23:29:00,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:00,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:00,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:00,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:29:00,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:29:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:29:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:29:00,497 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-30 23:29:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:01,006 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-30 23:29:01,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:29:01,007 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 23:29:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:01,007 INFO L225 Difference]: With dead ends: 255 [2018-09-30 23:29:01,007 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:29:01,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:29:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:29:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:29:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:29:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-30 23:29:01,011 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-30 23:29:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:01,011 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-30 23:29:01,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:29:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-30 23:29:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:29:01,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:01,012 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-30 23:29:01,012 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:01,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-30 23:29:01,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:01,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:01,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:01,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:01,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:06,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:06,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:06,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:06,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:06,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:06,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:07,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:07,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:29:07,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:29:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:29:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:29:07,012 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-30 23:29:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:07,318 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 23:29:07,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:29:07,319 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-30 23:29:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:07,319 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:29:07,319 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:29:07,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:29:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:29:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 23:29:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:29:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 23:29:07,323 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-30 23:29:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:07,324 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 23:29:07,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:29:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 23:29:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:29:07,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:07,325 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-30 23:29:07,325 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:07,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-30 23:29:07,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:07,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:07,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:07,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:07,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:13,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:13,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:13,237 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:13,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 23:29:13,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:13,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:13,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:13,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:29:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:29:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:29:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:29:13,482 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-30 23:29:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:14,046 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-30 23:29:14,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:29:14,046 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 23:29:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:14,047 INFO L225 Difference]: With dead ends: 259 [2018-09-30 23:29:14,047 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:29:14,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:29:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:29:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:29:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:29:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-30 23:29:14,051 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-30 23:29:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:14,051 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-30 23:29:14,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:29:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-30 23:29:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:29:14,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:14,052 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-30 23:29:14,053 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:14,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-30 23:29:14,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:14,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:14,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:14,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:20,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:20,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:20,332 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:20,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 23:29:20,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:20,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:20,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:20,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:29:20,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:29:20,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:29:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:29:20,573 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-30 23:29:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:20,913 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 23:29:20,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:29:20,914 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-30 23:29:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:20,915 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:29:20,915 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:29:20,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:29:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:29:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:29:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:29:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 23:29:20,919 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-30 23:29:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:20,920 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 23:29:20,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:29:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 23:29:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:29:20,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:20,921 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-30 23:29:20,921 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:20,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-30 23:29:20,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:20,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:20,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:20,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:20,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:27,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:27,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:27,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:27,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:27,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:27,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:29:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:29:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:29:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:29:27,211 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-30 23:29:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:27,786 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-30 23:29:27,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:29:27,786 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 23:29:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:27,787 INFO L225 Difference]: With dead ends: 263 [2018-09-30 23:29:27,787 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:29:27,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:29:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:29:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:29:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:29:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-30 23:29:27,792 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-30 23:29:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:27,792 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-30 23:29:27,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:29:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-30 23:29:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:29:27,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:27,793 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-30 23:29:27,793 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:27,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-30 23:29:27,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:27,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:27,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:27,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:33,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:33,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:33,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:34,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:34,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:34,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:34,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:34,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:29:34,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:29:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:29:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:29:34,095 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-30 23:29:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:34,467 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 23:29:34,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:29:34,467 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-30 23:29:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:34,468 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:29:34,468 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:29:34,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:29:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:29:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 23:29:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:29:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 23:29:34,473 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-30 23:29:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:34,473 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 23:29:34,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:29:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 23:29:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:29:34,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:34,474 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-30 23:29:34,475 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:34,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-30 23:29:34,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:34,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:34,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:41,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:41,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:41,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:41,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 23:29:41,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:41,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:41,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:41,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:29:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:29:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:29:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:29:41,291 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-09-30 23:29:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:41,933 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-09-30 23:29:41,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:29:41,933 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-30 23:29:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:41,934 INFO L225 Difference]: With dead ends: 267 [2018-09-30 23:29:41,934 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 23:29:41,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:29:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 23:29:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 23:29:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:29:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-09-30 23:29:41,938 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-09-30 23:29:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:41,938 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-09-30 23:29:41,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:29:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-09-30 23:29:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 23:29:41,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:41,939 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-09-30 23:29:41,939 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:41,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:41,939 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-09-30 23:29:41,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:41,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:41,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:41,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:41,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:48,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:48,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:48,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:48,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:48,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:48,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:48,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:48,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:29:48,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:29:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:29:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:29:48,530 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-09-30 23:29:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:49,204 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 23:29:49,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:29:49,204 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-09-30 23:29:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:49,205 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:29:49,205 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:29:49,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:29:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:29:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 23:29:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:29:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 23:29:49,208 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-09-30 23:29:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:49,209 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 23:29:49,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:29:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 23:29:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:29:49,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:49,209 INFO L375 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-09-30 23:29:49,210 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:49,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-09-30 23:29:49,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:49,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:49,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:49,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:49,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:55,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:55,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:55,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:56,050 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 132 check-sat command(s) [2018-09-30 23:29:56,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:56,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:56,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:56,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:29:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:29:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:29:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:29:56,136 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-09-30 23:29:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:56,756 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-09-30 23:29:56,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:29:56,757 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-09-30 23:29:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:56,757 INFO L225 Difference]: With dead ends: 271 [2018-09-30 23:29:56,757 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:29:56,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:29:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:29:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 23:29:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:29:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-09-30 23:29:56,761 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-09-30 23:29:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:56,761 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-09-30 23:29:56,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:29:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-09-30 23:29:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:29:56,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:56,762 INFO L375 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-09-30 23:29:56,762 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:56,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-09-30 23:29:56,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:56,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:56,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:56,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:56,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:03,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:03,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:03,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:03,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2018-09-30 23:30:03,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:03,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:03,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:03,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:30:03,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:30:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:30:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:30:03,671 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-09-30 23:30:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:04,027 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 23:30:04,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:30:04,028 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-09-30 23:30:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:04,029 INFO L225 Difference]: With dead ends: 273 [2018-09-30 23:30:04,029 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:30:04,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:30:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:30:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:30:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:30:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 23:30:04,033 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-09-30 23:30:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:04,033 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 23:30:04,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:30:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 23:30:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 23:30:04,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:04,034 INFO L375 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-09-30 23:30:04,034 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:04,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-09-30 23:30:04,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:04,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:04,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:04,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:04,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:10,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:10,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:10,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:10,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:10,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:10,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:30:10,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:30:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:30:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:30:10,892 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-09-30 23:30:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:11,299 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-09-30 23:30:11,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:30:11,299 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-09-30 23:30:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:11,300 INFO L225 Difference]: With dead ends: 275 [2018-09-30 23:30:11,300 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 23:30:11,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:30:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 23:30:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 23:30:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:30:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-09-30 23:30:11,304 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-09-30 23:30:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:11,304 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-09-30 23:30:11,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:30:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-09-30 23:30:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:30:11,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:11,305 INFO L375 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-09-30 23:30:11,305 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:11,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-09-30 23:30:11,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:11,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:11,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:17,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:17,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:17,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:18,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:18,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:18,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:18,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:18,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:30:18,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:30:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:30:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:30:18,115 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-09-30 23:30:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:18,624 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 23:30:18,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:30:18,625 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-09-30 23:30:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:18,626 INFO L225 Difference]: With dead ends: 277 [2018-09-30 23:30:18,626 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:30:18,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:30:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:30:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:30:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:30:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 23:30:18,632 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-09-30 23:30:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:18,632 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 23:30:18,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:30:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 23:30:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:30:18,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:18,634 INFO L375 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-09-30 23:30:18,634 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:18,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-09-30 23:30:18,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:18,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:18,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:18,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:18,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:25,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:25,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:25,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:25,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 136 check-sat command(s) [2018-09-30 23:30:25,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:25,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:25,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:25,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:30:25,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:30:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:30:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:30:25,874 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-09-30 23:30:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:26,376 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-09-30 23:30:26,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:30:26,376 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-09-30 23:30:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:26,377 INFO L225 Difference]: With dead ends: 279 [2018-09-30 23:30:26,377 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:30:26,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:30:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:30:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:30:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:30:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-09-30 23:30:26,381 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-09-30 23:30:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:26,381 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-09-30 23:30:26,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:30:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-09-30 23:30:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 23:30:26,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:26,382 INFO L375 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-09-30 23:30:26,382 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:26,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-09-30 23:30:26,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:26,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:26,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:33,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:33,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:33,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:30:33,351 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:30:33,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:33,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:33,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:33,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:30:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:30:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:30:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:30:33,442 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. [2018-09-30 23:30:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:33,832 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-30 23:30:33,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:30:33,833 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 276 [2018-09-30 23:30:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:33,834 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:30:33,834 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:30:33,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:30:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:30:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 23:30:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 23:30:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-30 23:30:33,839 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2018-09-30 23:30:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:33,839 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-30 23:30:33,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 23:30:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-30 23:30:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:30:33,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:33,840 INFO L375 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1] [2018-09-30 23:30:33,840 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:33,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:33,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1423796655, now seen corresponding path program 137 times [2018-09-30 23:30:33,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:33,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:33,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:33,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:33,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:40,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:40,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:40,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:41,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 138 check-sat command(s) [2018-09-30 23:30:41,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:41,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:41,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:41,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:30:41,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:30:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:30:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:30:41,099 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 140 states. [2018-09-30 23:30:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:41,541 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-09-30 23:30:41,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:30:41,541 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-09-30 23:30:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:41,542 INFO L225 Difference]: With dead ends: 283 [2018-09-30 23:30:41,542 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:30:41,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:30:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:30:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 23:30:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:30:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-09-30 23:30:41,546 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2018-09-30 23:30:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:41,546 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-09-30 23:30:41,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:30:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-09-30 23:30:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-30 23:30:41,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:41,547 INFO L375 BasicCegarLoop]: trace histogram [139, 138, 1, 1, 1] [2018-09-30 23:30:41,547 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:41,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1826034059, now seen corresponding path program 138 times [2018-09-30 23:30:41,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:41,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:41,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:41,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:41,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19182 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:48,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:48,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:48,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:48,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2018-09-30 23:30:48,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:48,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19182 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:49,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:49,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 23:30:49,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 23:30:49,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 23:30:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:30:49,002 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 141 states. [2018-09-30 23:30:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:49,779 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-09-30 23:30:49,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:30:49,779 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 280 [2018-09-30 23:30:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:49,780 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:30:49,780 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 23:30:49,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:30:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 23:30:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 23:30:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:30:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-09-30 23:30:49,784 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2018-09-30 23:30:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:49,784 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-09-30 23:30:49,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 23:30:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-09-30 23:30:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:30:49,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:49,785 INFO L375 BasicCegarLoop]: trace histogram [140, 139, 1, 1, 1] [2018-09-30 23:30:49,785 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:49,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1822841275, now seen corresponding path program 139 times [2018-09-30 23:30:49,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:49,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:49,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:49,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:49,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19460 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:57,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:57,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:57,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:57,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19460 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:57,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:57,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:30:57,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:30:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:30:57,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:30:57,612 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 142 states. [2018-09-30 23:30:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:58,405 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2018-09-30 23:30:58,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:30:58,406 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-09-30 23:30:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:58,406 INFO L225 Difference]: With dead ends: 287 [2018-09-30 23:30:58,407 INFO L226 Difference]: Without dead ends: 285 [2018-09-30 23:30:58,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:30:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-09-30 23:30:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-09-30 23:30:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 23:30:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2018-09-30 23:30:58,410 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2018-09-30 23:30:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2018-09-30 23:30:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:30:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2018-09-30 23:30:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 23:30:58,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:58,411 INFO L375 BasicCegarLoop]: trace histogram [141, 140, 1, 1, 1] [2018-09-30 23:30:58,411 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:58,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 596243583, now seen corresponding path program 140 times [2018-09-30 23:30:58,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:58,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:58,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 19740 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:05,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:05,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:05,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:05,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:05,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:05,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19740 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:05,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:05,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 23:31:05,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:31:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:31:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:31:05,873 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 143 states. [2018-09-30 23:31:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:06,656 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-09-30 23:31:06,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:31:06,656 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 284 [2018-09-30 23:31:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:06,657 INFO L225 Difference]: With dead ends: 289 [2018-09-30 23:31:06,657 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 23:31:06,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:31:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 23:31:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 23:31:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 23:31:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-09-30 23:31:06,662 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2018-09-30 23:31:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:06,662 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-09-30 23:31:06,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:31:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-09-30 23:31:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 23:31:06,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:06,664 INFO L375 BasicCegarLoop]: trace histogram [142, 141, 1, 1, 1] [2018-09-30 23:31:06,664 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:06,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:06,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1759484985, now seen corresponding path program 141 times [2018-09-30 23:31:06,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:06,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:06,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:06,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:06,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20022 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:14,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:14,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:14,393 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:31:14,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 142 check-sat command(s) [2018-09-30 23:31:14,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:14,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20022 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:14,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:14,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:31:14,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:31:14,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:31:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:31:14,721 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 144 states. [2018-09-30 23:31:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:15,283 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-09-30 23:31:15,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:31:15,283 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-09-30 23:31:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:15,284 INFO L225 Difference]: With dead ends: 291 [2018-09-30 23:31:15,284 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 23:31:15,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:31:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 23:31:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-09-30 23:31:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 23:31:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2018-09-30 23:31:15,288 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2018-09-30 23:31:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:15,288 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2018-09-30 23:31:15,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:31:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2018-09-30 23:31:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 23:31:15,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:15,289 INFO L375 BasicCegarLoop]: trace histogram [143, 142, 1, 1, 1] [2018-09-30 23:31:15,289 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:15,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1351991949, now seen corresponding path program 142 times [2018-09-30 23:31:15,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:15,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:15,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:15,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:15,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20306 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:23,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:23,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:23,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:23,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:23,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:23,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20306 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:23,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:23,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 23:31:23,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 23:31:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 23:31:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:31:23,296 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 145 states. [2018-09-30 23:31:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:24,077 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-09-30 23:31:24,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:31:24,078 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 288 [2018-09-30 23:31:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:24,078 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:31:24,078 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:31:24,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:31:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:31:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 23:31:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:31:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-09-30 23:31:24,082 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2018-09-30 23:31:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:24,082 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-09-30 23:31:24,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 23:31:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-09-30 23:31:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 23:31:24,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:24,083 INFO L375 BasicCegarLoop]: trace histogram [144, 143, 1, 1, 1] [2018-09-30 23:31:24,084 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:24,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2110879789, now seen corresponding path program 143 times [2018-09-30 23:31:24,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:24,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:24,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:24,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:31,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:31,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:31,601 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:31:31,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 144 check-sat command(s) [2018-09-30 23:31:31,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:31,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:31,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:31,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:31:31,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:31:31,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:31:31,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:31:31,883 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 146 states. [2018-09-30 23:31:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:32,305 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-09-30 23:31:32,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:31:32,306 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-09-30 23:31:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:32,306 INFO L225 Difference]: With dead ends: 295 [2018-09-30 23:31:32,306 INFO L226 Difference]: Without dead ends: 293 [2018-09-30 23:31:32,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:31:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-30 23:31:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-09-30 23:31:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 23:31:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-09-30 23:31:32,310 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2018-09-30 23:31:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:32,310 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-09-30 23:31:32,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:31:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-09-30 23:31:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:31:32,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:32,311 INFO L375 BasicCegarLoop]: trace histogram [145, 144, 1, 1, 1] [2018-09-30 23:31:32,312 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:32,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1330965607, now seen corresponding path program 144 times [2018-09-30 23:31:32,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:32,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:32,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:32,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20880 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:40,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:40,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:40,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:31:40,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 145 check-sat command(s) [2018-09-30 23:31:40,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:40,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20880 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:40,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:40,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 23:31:40,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 23:31:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 23:31:40,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:31:40,654 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 147 states. [2018-09-30 23:31:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:41,559 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-09-30 23:31:41,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:31:41,559 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 292 [2018-09-30 23:31:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:41,560 INFO L225 Difference]: With dead ends: 297 [2018-09-30 23:31:41,560 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 23:31:41,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:31:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 23:31:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-30 23:31:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 23:31:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-09-30 23:31:41,564 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2018-09-30 23:31:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:41,564 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-09-30 23:31:41,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 23:31:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-09-30 23:31:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 23:31:41,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:41,565 INFO L375 BasicCegarLoop]: trace histogram [146, 145, 1, 1, 1] [2018-09-30 23:31:41,565 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:41,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash -842253791, now seen corresponding path program 145 times [2018-09-30 23:31:41,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:41,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:41,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:41,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:41,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21170 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:49,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:49,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:49,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:49,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21170 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:49,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:49,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:31:49,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:31:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:31:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:31:49,835 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 148 states. [2018-09-30 23:31:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:50,497 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2018-09-30 23:31:50,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:31:50,497 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-09-30 23:31:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:50,498 INFO L225 Difference]: With dead ends: 299 [2018-09-30 23:31:50,498 INFO L226 Difference]: Without dead ends: 297 [2018-09-30 23:31:50,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:31:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-09-30 23:31:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-09-30 23:31:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-09-30 23:31:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2018-09-30 23:31:50,502 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2018-09-30 23:31:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:50,502 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2018-09-30 23:31:50,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:31:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2018-09-30 23:31:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-30 23:31:50,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:50,503 INFO L375 BasicCegarLoop]: trace histogram [147, 146, 1, 1, 1] [2018-09-30 23:31:50,503 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:50,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1951989413, now seen corresponding path program 146 times [2018-09-30 23:31:50,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:50,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:50,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:50,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:50,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21462 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:58,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:58,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:58,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:58,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:58,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:58,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21462 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:58,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:58,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 23:31:58,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:31:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:31:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:31:58,768 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 149 states. [2018-09-30 23:31:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:59,550 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-09-30 23:31:59,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:31:59,550 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 296 [2018-09-30 23:31:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:59,552 INFO L225 Difference]: With dead ends: 301 [2018-09-30 23:31:59,552 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:31:59,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:31:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:31:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 23:31:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 23:31:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-09-30 23:31:59,558 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2018-09-30 23:31:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:59,559 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-09-30 23:31:59,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:31:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-09-30 23:31:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:31:59,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:59,560 INFO L375 BasicCegarLoop]: trace histogram [148, 147, 1, 1, 1] [2018-09-30 23:31:59,560 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:59,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1038934549, now seen corresponding path program 147 times [2018-09-30 23:31:59,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:59,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:59,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:59,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:59,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21756 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:07,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:07,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:07,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:08,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 148 check-sat command(s) [2018-09-30 23:32:08,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:08,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21756 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:08,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:08,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:32:08,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:32:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:32:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:32:08,141 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 150 states. [2018-09-30 23:32:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:09,125 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-09-30 23:32:09,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:32:09,125 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-09-30 23:32:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:09,126 INFO L225 Difference]: With dead ends: 303 [2018-09-30 23:32:09,126 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 23:32:09,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:32:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 23:32:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 23:32:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:32:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2018-09-30 23:32:09,129 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2018-09-30 23:32:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:09,130 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2018-09-30 23:32:09,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:32:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2018-09-30 23:32:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-30 23:32:09,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:09,131 INFO L375 BasicCegarLoop]: trace histogram [149, 148, 1, 1, 1] [2018-09-30 23:32:09,131 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:09,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:09,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1983741007, now seen corresponding path program 148 times [2018-09-30 23:32:09,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:09,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:09,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:09,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22052 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:17,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:17,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:17,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:17,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:17,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:17,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22052 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:17,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:17,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 23:32:17,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 23:32:17,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 23:32:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:32:17,474 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 151 states. [2018-09-30 23:32:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:18,457 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-09-30 23:32:18,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:32:18,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 300 [2018-09-30 23:32:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:18,458 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:32:18,458 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 23:32:18,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:32:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 23:32:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-30 23:32:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 23:32:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-09-30 23:32:18,463 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2018-09-30 23:32:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:18,463 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-09-30 23:32:18,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 23:32:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-09-30 23:32:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 23:32:18,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:18,464 INFO L375 BasicCegarLoop]: trace histogram [150, 149, 1, 1, 1] [2018-09-30 23:32:18,465 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:18,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -590319607, now seen corresponding path program 149 times [2018-09-30 23:32:18,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:18,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:18,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:18,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:18,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22350 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:26,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:26,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:26,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:27,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 150 check-sat command(s) [2018-09-30 23:32:27,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:27,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22350 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:27,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:32:27,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:32:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:32:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:32:27,249 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 152 states. [2018-09-30 23:32:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:27,863 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-09-30 23:32:27,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:32:27,863 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 302 [2018-09-30 23:32:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:27,864 INFO L225 Difference]: With dead ends: 307 [2018-09-30 23:32:27,864 INFO L226 Difference]: Without dead ends: 305 [2018-09-30 23:32:27,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:32:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-09-30 23:32:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2018-09-30 23:32:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-30 23:32:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-09-30 23:32:27,869 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2018-09-30 23:32:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:27,869 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-09-30 23:32:27,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:32:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-09-30 23:32:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-30 23:32:27,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:27,871 INFO L375 BasicCegarLoop]: trace histogram [151, 150, 1, 1, 1] [2018-09-30 23:32:27,871 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:27,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash -361407165, now seen corresponding path program 150 times [2018-09-30 23:32:27,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:27,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:27,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:27,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22650 backedges. 0 proven. 22650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:36,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:36,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:36,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:36,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 151 check-sat command(s) [2018-09-30 23:32:36,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:36,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22650 backedges. 0 proven. 22650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:36,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:36,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 23:32:36,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 23:32:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 23:32:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:32:36,768 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 153 states. [2018-09-30 23:32:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:37,253 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-09-30 23:32:37,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:32:37,253 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 304 [2018-09-30 23:32:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:37,254 INFO L225 Difference]: With dead ends: 309 [2018-09-30 23:32:37,254 INFO L226 Difference]: Without dead ends: 307 [2018-09-30 23:32:37,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:32:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-30 23:32:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-30 23:32:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-30 23:32:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-09-30 23:32:37,258 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2018-09-30 23:32:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:37,259 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-09-30 23:32:37,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 23:32:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-09-30 23:32:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-30 23:32:37,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:37,260 INFO L375 BasicCegarLoop]: trace histogram [152, 151, 1, 1, 1] [2018-09-30 23:32:37,260 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:37,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash 580117501, now seen corresponding path program 151 times [2018-09-30 23:32:37,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:37,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:37,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:37,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:37,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22952 backedges. 0 proven. 22952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:46,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:46,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:46,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22952 backedges. 0 proven. 22952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:46,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:46,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:32:46,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:32:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:32:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:32:46,269 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 154 states. [2018-09-30 23:32:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:46,836 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2018-09-30 23:32:46,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:32:46,837 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 306 [2018-09-30 23:32:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:46,838 INFO L225 Difference]: With dead ends: 311 [2018-09-30 23:32:46,839 INFO L226 Difference]: Without dead ends: 309 [2018-09-30 23:32:46,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:32:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-09-30 23:32:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-09-30 23:32:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-30 23:32:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2018-09-30 23:32:46,844 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2018-09-30 23:32:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:46,845 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2018-09-30 23:32:46,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:32:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2018-09-30 23:32:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-30 23:32:46,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:46,846 INFO L375 BasicCegarLoop]: trace histogram [153, 152, 1, 1, 1] [2018-09-30 23:32:46,847 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:46,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -852777929, now seen corresponding path program 152 times [2018-09-30 23:32:46,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:46,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:46,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:46,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23256 backedges. 0 proven. 23256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:55,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:55,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:55,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:56,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:56,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:56,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23256 backedges. 0 proven. 23256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:56,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:56,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 23:32:56,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:32:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:32:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:32:56,137 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 155 states. [2018-09-30 23:32:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:56,658 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-09-30 23:32:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:32:56,659 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 308 [2018-09-30 23:32:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:56,660 INFO L225 Difference]: With dead ends: 313 [2018-09-30 23:32:56,661 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 23:32:56,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:32:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 23:32:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-30 23:32:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 23:32:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-09-30 23:32:56,666 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2018-09-30 23:32:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:56,666 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-09-30 23:32:56,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:32:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-09-30 23:32:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-30 23:32:56,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:56,667 INFO L375 BasicCegarLoop]: trace histogram [154, 153, 1, 1, 1] [2018-09-30 23:32:56,667 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:56,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash 819215857, now seen corresponding path program 153 times [2018-09-30 23:32:56,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:56,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:56,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:56,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:56,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23562 backedges. 0 proven. 23562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:05,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:05,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:05,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:05,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 154 check-sat command(s) [2018-09-30 23:33:05,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:05,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23562 backedges. 0 proven. 23562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:05,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:05,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:33:05,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:33:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:33:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:33:05,992 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 156 states. [2018-09-30 23:33:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:06,510 INFO L93 Difference]: Finished difference Result 315 states and 315 transitions. [2018-09-30 23:33:06,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:33:06,510 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 310 [2018-09-30 23:33:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:06,511 INFO L225 Difference]: With dead ends: 315 [2018-09-30 23:33:06,511 INFO L226 Difference]: Without dead ends: 313 [2018-09-30 23:33:06,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:33:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-09-30 23:33:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-09-30 23:33:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-09-30 23:33:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-09-30 23:33:06,515 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2018-09-30 23:33:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-09-30 23:33:06,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:33:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-09-30 23:33:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-09-30 23:33:06,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:06,516 INFO L375 BasicCegarLoop]: trace histogram [155, 154, 1, 1, 1] [2018-09-30 23:33:06,517 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:06,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1287475499, now seen corresponding path program 154 times [2018-09-30 23:33:06,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:06,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:06,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23870 backedges. 0 proven. 23870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:15,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:15,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:15,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:15,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:15,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:15,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23870 backedges. 0 proven. 23870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:15,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:15,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 23:33:15,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 23:33:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 23:33:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:33:15,608 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 157 states. [2018-09-30 23:33:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:16,325 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-09-30 23:33:16,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:33:16,325 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 312 [2018-09-30 23:33:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:16,326 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:33:16,326 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:33:16,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:33:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:33:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-30 23:33:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:33:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-09-30 23:33:16,331 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2018-09-30 23:33:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:16,331 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-09-30 23:33:16,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 23:33:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-09-30 23:33:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-30 23:33:16,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:16,333 INFO L375 BasicCegarLoop]: trace histogram [156, 155, 1, 1, 1] [2018-09-30 23:33:16,333 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:16,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash 313425381, now seen corresponding path program 155 times [2018-09-30 23:33:16,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:16,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:16,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:16,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:16,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24180 backedges. 0 proven. 24180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:25,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:25,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:25,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:25,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 156 check-sat command(s) [2018-09-30 23:33:25,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:25,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24180 backedges. 0 proven. 24180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:25,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:25,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:33:25,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:33:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:33:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:33:25,710 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 158 states. [2018-09-30 23:33:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:26,871 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-09-30 23:33:26,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:33:26,872 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 314 [2018-09-30 23:33:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:26,872 INFO L225 Difference]: With dead ends: 319 [2018-09-30 23:33:26,872 INFO L226 Difference]: Without dead ends: 317 [2018-09-30 23:33:26,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:33:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-09-30 23:33:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-09-30 23:33:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-30 23:33:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-09-30 23:33:26,876 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2018-09-30 23:33:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:26,876 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-09-30 23:33:26,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:33:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-09-30 23:33:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-30 23:33:26,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:26,877 INFO L375 BasicCegarLoop]: trace histogram [157, 156, 1, 1, 1] [2018-09-30 23:33:26,877 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:26,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 554132511, now seen corresponding path program 156 times [2018-09-30 23:33:26,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:26,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:26,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:26,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24492 backedges. 0 proven. 24492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:35,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:35,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:35,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:36,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 157 check-sat command(s) [2018-09-30 23:33:36,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:36,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24492 backedges. 0 proven. 24492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:36,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:36,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 23:33:36,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 23:33:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 23:33:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:33:36,258 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 159 states. [2018-09-30 23:33:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:37,475 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-09-30 23:33:37,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 23:33:37,475 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 316 [2018-09-30 23:33:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:37,476 INFO L225 Difference]: With dead ends: 321 [2018-09-30 23:33:37,476 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 23:33:37,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:33:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 23:33:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-30 23:33:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-30 23:33:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-09-30 23:33:37,480 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2018-09-30 23:33:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:37,480 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-09-30 23:33:37,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 23:33:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-09-30 23:33:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 23:33:37,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:37,481 INFO L375 BasicCegarLoop]: trace histogram [158, 157, 1, 1, 1] [2018-09-30 23:33:37,481 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:37,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash -54549543, now seen corresponding path program 157 times [2018-09-30 23:33:37,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:37,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:37,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24806 backedges. 0 proven. 24806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:46,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:46,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:46,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:46,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24806 backedges. 0 proven. 24806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:47,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:47,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:33:47,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:33:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:33:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:33:47,059 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 160 states. [2018-09-30 23:33:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:47,912 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-09-30 23:33:47,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:33:47,912 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 318 [2018-09-30 23:33:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:47,913 INFO L225 Difference]: With dead ends: 323 [2018-09-30 23:33:47,913 INFO L226 Difference]: Without dead ends: 321 [2018-09-30 23:33:47,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:33:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-09-30 23:33:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-09-30 23:33:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-09-30 23:33:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2018-09-30 23:33:47,917 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2018-09-30 23:33:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:47,917 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2018-09-30 23:33:47,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:33:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2018-09-30 23:33:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-30 23:33:47,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:47,918 INFO L375 BasicCegarLoop]: trace histogram [159, 158, 1, 1, 1] [2018-09-30 23:33:47,919 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:47,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash -882451181, now seen corresponding path program 158 times [2018-09-30 23:33:47,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:47,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:47,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:47,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:47,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25122 backedges. 0 proven. 25122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:57,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:57,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:57,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:57,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:57,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:57,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25122 backedges. 0 proven. 25122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:57,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:57,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 23:33:57,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:33:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:33:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:33:57,675 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand 161 states. [2018-09-30 23:33:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:58,561 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-09-30 23:33:58,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:33:58,561 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 320 [2018-09-30 23:33:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:58,562 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:33:58,562 INFO L226 Difference]: Without dead ends: 323 [2018-09-30 23:33:58,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:33:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-30 23:33:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-30 23:33:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-30 23:33:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-09-30 23:33:58,566 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2018-09-30 23:33:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:58,566 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-09-30 23:33:58,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:33:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-09-30 23:33:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 23:33:58,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:58,567 INFO L375 BasicCegarLoop]: trace histogram [160, 159, 1, 1, 1] [2018-09-30 23:33:58,568 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:58,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1926975539, now seen corresponding path program 159 times [2018-09-30 23:33:58,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:58,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:58,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:58,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25440 backedges. 0 proven. 25440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:08,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:08,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:08,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:08,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 160 check-sat command(s) [2018-09-30 23:34:08,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:08,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25440 backedges. 0 proven. 25440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:08,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:08,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:34:08,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:34:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:34:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:34:08,476 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 162 states. [2018-09-30 23:34:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:09,670 INFO L93 Difference]: Finished difference Result 327 states and 327 transitions. [2018-09-30 23:34:09,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:34:09,670 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 322 [2018-09-30 23:34:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:09,671 INFO L225 Difference]: With dead ends: 327 [2018-09-30 23:34:09,671 INFO L226 Difference]: Without dead ends: 325 [2018-09-30 23:34:09,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:34:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-09-30 23:34:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-09-30 23:34:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-09-30 23:34:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2018-09-30 23:34:09,675 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2018-09-30 23:34:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:09,676 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2018-09-30 23:34:09,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:34:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2018-09-30 23:34:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-09-30 23:34:09,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:09,677 INFO L375 BasicCegarLoop]: trace histogram [161, 160, 1, 1, 1] [2018-09-30 23:34:09,677 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:09,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -692536313, now seen corresponding path program 160 times [2018-09-30 23:34:09,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:09,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:09,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25760 backedges. 0 proven. 25760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:19,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:19,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:19,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:19,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:19,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:19,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25760 backedges. 0 proven. 25760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:19,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:19,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-09-30 23:34:19,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 23:34:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 23:34:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:34:19,659 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand 163 states. [2018-09-30 23:34:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:20,275 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-09-30 23:34:20,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:34:20,275 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 324 [2018-09-30 23:34:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:20,276 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:34:20,276 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 23:34:20,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:34:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 23:34:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-30 23:34:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-30 23:34:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-09-30 23:34:20,280 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2018-09-30 23:34:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:20,280 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-09-30 23:34:20,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 23:34:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-09-30 23:34:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-30 23:34:20,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:20,281 INFO L375 BasicCegarLoop]: trace histogram [162, 161, 1, 1, 1] [2018-09-30 23:34:20,282 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:20,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash 192586177, now seen corresponding path program 161 times [2018-09-30 23:34:20,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:20,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:20,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:20,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:20,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26082 backedges. 0 proven. 26082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:30,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:30,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:30,126 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:30,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 162 check-sat command(s) [2018-09-30 23:34:30,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:30,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 26082 backedges. 0 proven. 26082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:30,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:30,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:34:30,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:34:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:34:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:34:30,480 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 164 states. [2018-09-30 23:34:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:31,754 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-09-30 23:34:31,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:34:31,761 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 326 [2018-09-30 23:34:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:31,761 INFO L225 Difference]: With dead ends: 331 [2018-09-30 23:34:31,761 INFO L226 Difference]: Without dead ends: 329 [2018-09-30 23:34:31,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:34:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-09-30 23:34:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2018-09-30 23:34:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-09-30 23:34:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2018-09-30 23:34:31,767 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2018-09-30 23:34:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:31,767 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2018-09-30 23:34:31,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:34:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2018-09-30 23:34:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-30 23:34:31,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:31,769 INFO L375 BasicCegarLoop]: trace histogram [163, 162, 1, 1, 1] [2018-09-30 23:34:31,769 INFO L423 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:31,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash 391774459, now seen corresponding path program 162 times [2018-09-30 23:34:31,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:31,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:31,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:31,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:31,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26406 backedges. 0 proven. 26406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:41,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:41,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:41,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:41,804 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 163 check-sat command(s) [2018-09-30 23:34:41,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:41,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26406 backedges. 0 proven. 26406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:41,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:41,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-09-30 23:34:41,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-09-30 23:34:41,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-09-30 23:34:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:34:41,918 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand 165 states. [2018-09-30 23:34:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:42,802 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-09-30 23:34:42,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:34:42,802 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 328 [2018-09-30 23:34:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:42,803 INFO L225 Difference]: With dead ends: 333 [2018-09-30 23:34:42,803 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 23:34:42,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:34:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 23:34:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-30 23:34:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-30 23:34:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-09-30 23:34:42,808 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2018-09-30 23:34:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:42,808 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-09-30 23:34:42,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-09-30 23:34:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-09-30 23:34:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-30 23:34:42,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:42,809 INFO L375 BasicCegarLoop]: trace histogram [164, 163, 1, 1, 1] [2018-09-30 23:34:42,809 INFO L423 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:42,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1461814859, now seen corresponding path program 163 times [2018-09-30 23:34:42,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:42,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:42,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:42,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:42,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26732 backedges. 0 proven. 26732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:52,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:34:52,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:34:52,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:53,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26732 backedges. 0 proven. 26732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:53,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:34:53,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-09-30 23:34:53,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:34:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:34:53,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:34:53,165 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 166 states. [2018-09-30 23:34:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:54,084 INFO L93 Difference]: Finished difference Result 335 states and 335 transitions. [2018-09-30 23:34:54,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-09-30 23:34:54,084 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 330 [2018-09-30 23:34:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:54,085 INFO L225 Difference]: With dead ends: 335 [2018-09-30 23:34:54,085 INFO L226 Difference]: Without dead ends: 333 [2018-09-30 23:34:54,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:34:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-09-30 23:34:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-09-30 23:34:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-09-30 23:34:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-09-30 23:34:54,092 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2018-09-30 23:34:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:54,092 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-09-30 23:34:54,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:34:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-09-30 23:34:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-09-30 23:34:54,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:54,094 INFO L375 BasicCegarLoop]: trace histogram [165, 164, 1, 1, 1] [2018-09-30 23:34:54,094 INFO L423 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:54,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash -349721617, now seen corresponding path program 164 times [2018-09-30 23:34:54,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:54,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:54,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:54,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:54,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 0 proven. 27060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:04,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:04,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:04,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:04,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:04,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:04,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 0 proven. 27060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:04,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:04,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-09-30 23:35:04,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 23:35:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 23:35:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:35:04,551 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 167 states. [2018-09-30 23:35:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:05,958 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-09-30 23:35:05,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 23:35:05,958 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 332 [2018-09-30 23:35:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:05,959 INFO L225 Difference]: With dead ends: 337 [2018-09-30 23:35:05,959 INFO L226 Difference]: Without dead ends: 335 [2018-09-30 23:35:05,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:35:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-30 23:35:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-30 23:35:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-30 23:35:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-09-30 23:35:05,963 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2018-09-30 23:35:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:05,964 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-09-30 23:35:05,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 23:35:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-09-30 23:35:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-30 23:35:05,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:05,965 INFO L375 BasicCegarLoop]: trace histogram [166, 165, 1, 1, 1] [2018-09-30 23:35:05,966 INFO L423 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:05,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1074972759, now seen corresponding path program 165 times [2018-09-30 23:35:05,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:05,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:05,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:05,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:05,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 27390 backedges. 0 proven. 27390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:16,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:16,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:16,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:16,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 166 check-sat command(s) [2018-09-30 23:35:16,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:16,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27390 backedges. 0 proven. 27390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:16,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:16,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-09-30 23:35:16,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:35:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:35:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:35:16,648 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 168 states. [2018-09-30 23:35:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:18,061 INFO L93 Difference]: Finished difference Result 339 states and 339 transitions. [2018-09-30 23:35:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-09-30 23:35:18,061 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 334 [2018-09-30 23:35:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:18,062 INFO L225 Difference]: With dead ends: 339 [2018-09-30 23:35:18,062 INFO L226 Difference]: Without dead ends: 337 [2018-09-30 23:35:18,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:35:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-09-30 23:35:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2018-09-30 23:35:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-09-30 23:35:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2018-09-30 23:35:18,066 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2018-09-30 23:35:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:18,066 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2018-09-30 23:35:18,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:35:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2018-09-30 23:35:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-30 23:35:18,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:18,067 INFO L375 BasicCegarLoop]: trace histogram [167, 166, 1, 1, 1] [2018-09-30 23:35:18,067 INFO L423 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:18,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2038349027, now seen corresponding path program 166 times [2018-09-30 23:35:18,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:18,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:18,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:18,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:18,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27722 backedges. 0 proven. 27722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:28,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:28,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:28,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:28,229 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:28,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:28,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27722 backedges. 0 proven. 27722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:28,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:28,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-09-30 23:35:28,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-09-30 23:35:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-09-30 23:35:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:35:28,366 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 169 states. [2018-09-30 23:35:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:29,143 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-09-30 23:35:29,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-09-30 23:35:29,143 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 336 [2018-09-30 23:35:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:29,144 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:35:29,144 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:35:29,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:35:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:35:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-30 23:35:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-30 23:35:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-09-30 23:35:29,148 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2018-09-30 23:35:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:29,148 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-09-30 23:35:29,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-09-30 23:35:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-09-30 23:35:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-30 23:35:29,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:29,149 INFO L375 BasicCegarLoop]: trace histogram [168, 167, 1, 1, 1] [2018-09-30 23:35:29,149 INFO L423 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:29,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:29,150 INFO L82 PathProgramCache]: Analyzing trace with hash 348380061, now seen corresponding path program 167 times [2018-09-30 23:35:29,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:29,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:29,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:29,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:29,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28056 backedges. 0 proven. 28056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:39,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:39,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:39,581 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 168 check-sat command(s) [2018-09-30 23:35:39,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:39,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 28056 backedges. 0 proven. 28056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:39,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-09-30 23:35:39,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:35:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:35:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:35:39,700 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 170 states. [2018-09-30 23:35:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:40,277 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-09-30 23:35:40,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-09-30 23:35:40,277 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 338 [2018-09-30 23:35:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:40,278 INFO L225 Difference]: With dead ends: 343 [2018-09-30 23:35:40,278 INFO L226 Difference]: Without dead ends: 341 [2018-09-30 23:35:40,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:35:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-09-30 23:35:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-09-30 23:35:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 23:35:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2018-09-30 23:35:40,282 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2018-09-30 23:35:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:40,282 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2018-09-30 23:35:40,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:35:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2018-09-30 23:35:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-30 23:35:40,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:40,284 INFO L375 BasicCegarLoop]: trace histogram [169, 168, 1, 1, 1] [2018-09-30 23:35:40,284 INFO L423 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:40,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash -214158377, now seen corresponding path program 168 times [2018-09-30 23:35:40,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:40,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:40,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:40,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:40,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28392 backedges. 0 proven. 28392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:50,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:35:50,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:35:50,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:51,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 169 check-sat command(s) [2018-09-30 23:35:51,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:51,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 28392 backedges. 0 proven. 28392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:51,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:35:51,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 170] total 170 [2018-09-30 23:35:51,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-09-30 23:35:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-09-30 23:35:51,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:35:51,223 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 171 states. [2018-09-30 23:35:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:51,888 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-09-30 23:35:51,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-09-30 23:35:51,889 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 340 [2018-09-30 23:35:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:51,889 INFO L225 Difference]: With dead ends: 345 [2018-09-30 23:35:51,889 INFO L226 Difference]: Without dead ends: 343 [2018-09-30 23:35:51,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:35:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-30 23:35:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-30 23:35:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-30 23:35:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-09-30 23:35:51,894 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2018-09-30 23:35:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:51,894 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-09-30 23:35:51,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-09-30 23:35:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-09-30 23:35:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-30 23:35:51,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:51,895 INFO L375 BasicCegarLoop]: trace histogram [170, 169, 1, 1, 1] [2018-09-30 23:35:51,895 INFO L423 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:51,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash 352282001, now seen corresponding path program 169 times [2018-09-30 23:35:51,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:51,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:51,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:51,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:51,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28730 backedges. 0 proven. 28730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:02,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:02,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:02,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:02,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28730 backedges. 0 proven. 28730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:02,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:02,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 171 [2018-09-30 23:36:02,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 23:36:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 23:36:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:36:02,861 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 172 states. [2018-09-30 23:36:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:03,564 INFO L93 Difference]: Finished difference Result 347 states and 347 transitions. [2018-09-30 23:36:03,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-09-30 23:36:03,565 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 342 [2018-09-30 23:36:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:03,565 INFO L225 Difference]: With dead ends: 347 [2018-09-30 23:36:03,566 INFO L226 Difference]: Without dead ends: 345 [2018-09-30 23:36:03,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:36:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-09-30 23:36:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2018-09-30 23:36:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-30 23:36:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2018-09-30 23:36:03,571 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2018-09-30 23:36:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2018-09-30 23:36:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 23:36:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2018-09-30 23:36:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-09-30 23:36:03,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:03,572 INFO L375 BasicCegarLoop]: trace histogram [171, 170, 1, 1, 1] [2018-09-30 23:36:03,572 INFO L423 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:03,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash -759361333, now seen corresponding path program 170 times [2018-09-30 23:36:03,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:03,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:03,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29070 backedges. 0 proven. 29070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:14,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:36:14,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:36:14,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:14,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:14,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:14,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 29070 backedges. 0 proven. 29070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:14,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:36:14,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172] total 172 [2018-09-30 23:36:14,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-09-30 23:36:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-09-30 23:36:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:36:14,604 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand 173 states. [2018-09-30 23:36:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:15,208 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-09-30 23:36:15,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-09-30 23:36:15,209 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 344 [2018-09-30 23:36:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:15,209 INFO L225 Difference]: With dead ends: 349 [2018-09-30 23:36:15,209 INFO L226 Difference]: Without dead ends: 347 [2018-09-30 23:36:15,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:36:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-30 23:36:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-30 23:36:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-30 23:36:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-09-30 23:36:15,214 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2018-09-30 23:36:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:15,214 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-09-30 23:36:15,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-09-30 23:36:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-09-30 23:36:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-30 23:36:15,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:15,216 INFO L375 BasicCegarLoop]: trace histogram [172, 171, 1, 1, 1] [2018-09-30 23:36:15,216 INFO L423 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:15,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 398251397, now seen corresponding path program 171 times [2018-09-30 23:36:15,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:15,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:15,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:15,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:15,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:36:25,013 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:36:25,017 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:36:25,017 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:36:25 BoogieIcfgContainer [2018-09-30 23:36:25,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:36:25,018 INFO L168 Benchmark]: Toolchain (without parser) took 755840.80 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 221.2 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 53.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-30 23:36:25,020 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:36:25,020 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:36:25,020 INFO L168 Benchmark]: Boogie Preprocessor took 20.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:36:25,021 INFO L168 Benchmark]: RCFGBuilder took 319.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:36:25,021 INFO L168 Benchmark]: TraceAbstraction took 755451.47 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 221.2 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 32.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-30 23:36:25,023 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.61 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 20.40 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 319.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 755451.47 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 221.2 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 32.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 347 with TraceHistMax 172, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 154 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 755.3s OverallTime, 172 OverallIterations, 172 TraceHistogramMax, 62.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 684 SDtfs, 0 SDslu, 20882 SDs, 0 SdLazy, 21053 SolverSat, 384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44457 GetRequests, 29751 SyntacticMatches, 0 SemanticMatches, 14706 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 638.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=347occurred in iteration=171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 171 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 19.5s SatisfiabilityAnalysisTime, 650.6s InterpolantComputationTime, 59504 NumberOfCodeBlocks, 59504 NumberOfCodeBlocksAsserted, 7594 NumberOfCheckSat, 59163 ConstructedInterpolants, 0 QuantifiedInterpolants, 40588881 SizeOfPredicates, 170 NumberOfNonLiveVariables, 60350 ConjunctsInSsa, 14875 ConjunctsInUnsatCore, 341 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3333360 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/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-36-25-031.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-36-25-031.csv Completed graceful shutdown