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/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:30:00,939 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:30:00,942 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:30:00,959 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:30:00,960 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:30:00,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:30:00,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:30:00,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:30:00,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:30:00,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:30:00,967 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:30:01,006 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:30:01,031 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:30:01,031 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:30:01,032 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:30:01,032 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:30:01,033 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:30:01,033 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:30:01,033 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:30:01,034 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:30:01,034 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:30:01,034 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:30:01,034 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:30:01,034 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:30:01,035 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:30:01,035 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:30:01,035 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:30:01,035 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:30:01,035 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:30:01,036 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:30:01,036 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:30:01,036 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:30:01,036 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:30:01,037 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:30:01,037 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:30:01,037 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:30:01,037 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:30:01,037 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:30:01,038 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:30:01,038 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:30:01,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:30:01,038 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:30:01,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:30:01,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:30:01,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:30:01,129 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:30:01,129 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:30:01,130 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-04 09:30:01,130 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-04 09:30:01,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:30:01,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:30:01,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:30:01,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:30:01,185 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:30:01,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,225 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:30:01,225 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:30:01,226 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:30:01,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:30:01,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:30:01,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:30:01,230 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:30:01,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... [2018-10-04 09:30:01,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:30:01,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:30:01,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:30:01,256 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:30:01,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:30:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-04 09:30:01,331 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-04 09:30:01,482 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:30:01,483 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:30:01 BoogieIcfgContainer [2018-10-04 09:30:01,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:30:01,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:30:01,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:30:01,487 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:30:01,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:30:01" (1/2) ... [2018-10-04 09:30:01,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a33fcc and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:30:01, skipping insertion in model container [2018-10-04 09:30:01,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:30:01" (2/2) ... [2018-10-04 09:30:01,491 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-04 09:30:01,500 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:30:01,508 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-04 09:30:01,557 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:30:01,558 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:30:01,558 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:30:01,558 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:30:01,559 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:30:01,559 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:30:01,559 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:30:01,559 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:30:01,559 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:30:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 09:30:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:30:01,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:01,583 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:30:01,585 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:01,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-04 09:30:01,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:01,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:01,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:01,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:01,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:30:01,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:30:01,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:30:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:30:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:30:01,734 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-04 09:30:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:01,830 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 09:30:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:30:01,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:30:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:01,857 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:30:01,858 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:30:01,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:30:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:30:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:30:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:30:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 09:30:01,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-04 09:30:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:01,946 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 09:30:01,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:30:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 09:30:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:30:01,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:01,950 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 09:30:01,950 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:01,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-04 09:30:01,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:01,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:01,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:01,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:01,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:30:01,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:30:01,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:30:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:30:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:30:01,980 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-04 09:30:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:01,995 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:30:01,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:30:01,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 09:30:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:01,996 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:30:01,996 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:30:01,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:30:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:30:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:30:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:30:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-04 09:30:02,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-04 09:30:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:02,000 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-04 09:30:02,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:30:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-04 09:30:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:30:02,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:02,001 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 09:30:02,002 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:02,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:02,002 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-04 09:30:02,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:02,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:02,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:30:02,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:30:02,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:30:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:30:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:30:02,097 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-04 09:30:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:02,148 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 09:30:02,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:30:02,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:30:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:02,149 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:30:02,150 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:30:02,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:30:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:30:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:30:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:30:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-04 09:30:02,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-04 09:30:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:02,154 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-04 09:30:02,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:30:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-04 09:30:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:30:02,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:02,155 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:30:02,156 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:02,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-04 09:30:02,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:02,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:02,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:02,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:02,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:02,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:02,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:02,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 09:30:02,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:30:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:30:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:30:02,329 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-04 09:30:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:02,357 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-04 09:30:02,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:30:02,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 09:30:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:02,359 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:30:02,359 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:30:02,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:30:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:30:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-04 09:30:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:30:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 09:30:02,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-04 09:30:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:02,363 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 09:30:02,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:30:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 09:30:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:30:02,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:02,364 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:30:02,364 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:02,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-04 09:30:02,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:02,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:02,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:02,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:02,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:02,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:02,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:02,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:02,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:02,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:30:02,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:30:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:30:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:02,537 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-04 09:30:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:02,588 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-04 09:30:02,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:30:02,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:30:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:02,590 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:30:02,590 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:30:02,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:30:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:30:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:30:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 09:30:02,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-04 09:30:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:02,596 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 09:30:02,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:30:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 09:30:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:30:02,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:02,597 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:30:02,598 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:02,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-04 09:30:02,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:02,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:02,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:02,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:02,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:02,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:02,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-04 09:30:02,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:02,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:02,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:02,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:30:02,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:30:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:30:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:02,872 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 09:30:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:02,973 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 09:30:02,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:30:02,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 09:30:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:02,975 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:30:02,975 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:30:02,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:30:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:30:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:30:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-04 09:30:02,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-04 09:30:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:02,980 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-04 09:30:02,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:30:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-04 09:30:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:30:02,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:02,981 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:30:02,981 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:02,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-04 09:30:02,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:02,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:02,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:02,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:03,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:03,200 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:03,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:03,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:03,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:30:03,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:30:03,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:30:03,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:03,241 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-04 09:30:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:03,296 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-04 09:30:03,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:30:03,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-04 09:30:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:03,299 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:30:03,300 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:30:03,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:30:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:30:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-04 09:30:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:30:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 09:30:03,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 09:30:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:03,304 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 09:30:03,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:30:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 09:30:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:30:03,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:03,305 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 09:30:03,305 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:03,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-04 09:30:03,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:03,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:03,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:03,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:03,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:03,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-04 09:30:03,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:03,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:03,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:30:03,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:30:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:30:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:03,535 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-04 09:30:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:03,570 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-04 09:30:03,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:30:03,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:30:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:03,572 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:30:03,572 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:30:03,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:30:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:30:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:30:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 09:30:03,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-04 09:30:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:03,577 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 09:30:03,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:30:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 09:30:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:30:03,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:03,578 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 09:30:03,578 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:03,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:03,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-04 09:30:03,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:03,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:03,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:03,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,637 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 [2018-10-04 09:30:03,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:03,653 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-04 09:30:03,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:03,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:03,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:30:03,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:30:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:30:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:03,685 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 09:30:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:03,731 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-04 09:30:03,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:30:03,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 09:30:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:03,733 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:30:03,733 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:30:03,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:30:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:30:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:30:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-04 09:30:03,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-04 09:30:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:03,738 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-04 09:30:03,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:30:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-04 09:30:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:30:03,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:03,739 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:30:03,739 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:03,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-04 09:30:03,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:03,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:03,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:03,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:03,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:04,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:30:04,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:30:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:30:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:04,017 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-04 09:30:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:04,270 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 09:30:04,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:30:04,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 09:30:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:04,271 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:30:04,271 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:30:04,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:30:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:30:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 09:30:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:30:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 09:30:04,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 09:30:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:04,275 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 09:30:04,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:30:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 09:30:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:30:04,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:04,276 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 09:30:04,276 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:04,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-04 09:30:04,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:04,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:04,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:04,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:04,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:04,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:04,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:04,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:04,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:04,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:30:04,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:30:04,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:30:04,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:04,540 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-04 09:30:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:04,577 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-04 09:30:04,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:30:04,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:30:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:04,579 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:30:04,579 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:30:04,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:30:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:30:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:30:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 09:30:04,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-04 09:30:04,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:04,583 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 09:30:04,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:30:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 09:30:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:30:04,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:04,584 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 09:30:04,585 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:04,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-04 09:30:04,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:04,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:04,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:04,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:04,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:04,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:04,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:30:04,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:04,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:04,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:30:04,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:30:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:30:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:04,775 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-04 09:30:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:04,818 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 09:30:04,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:30:04,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 09:30:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:04,820 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:30:04,820 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:30:04,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:30:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:30:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:30:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-04 09:30:04,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-04 09:30:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:04,826 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-04 09:30:04,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:30:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-04 09:30:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:30:04,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:04,827 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:30:04,827 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:04,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-04 09:30:04,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:04,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:04,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:04,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:04,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:04,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:04,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:04,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:04,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:04,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:05,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:30:05,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:30:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:30:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:05,040 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-04 09:30:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:05,140 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-04 09:30:05,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:30:05,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-04 09:30:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:05,141 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:30:05,141 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:30:05,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:30:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:30:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-04 09:30:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:30:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 09:30:05,146 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-04 09:30:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:05,147 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 09:30:05,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:30:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 09:30:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:30:05,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:05,148 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 09:30:05,148 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:05,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-04 09:30:05,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:05,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:05,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:05,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:05,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:05,246 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:05,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:30:05,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:05,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:05,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:30:05,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:30:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:30:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:05,312 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-04 09:30:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:05,381 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-04 09:30:05,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:30:05,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:30:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:05,382 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:30:05,382 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:30:05,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:30:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:30:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:30:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 09:30:05,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-04 09:30:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:05,386 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 09:30:05,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:30:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 09:30:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:30:05,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:05,387 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 09:30:05,387 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:05,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-04 09:30:05,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:05,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:05,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:05,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:05,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:05,513 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:05,531 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:30:05,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:05,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:05,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:30:05,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:30:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:30:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:05,561 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 09:30:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:05,592 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-04 09:30:05,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:30:05,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 09:30:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:05,593 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:30:05,594 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:30:05,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:30:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:30:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:30:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-04 09:30:05,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-04 09:30:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:05,599 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-04 09:30:05,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:30:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-04 09:30:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:30:05,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:05,600 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:30:05,600 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:05,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-04 09:30:05,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:05,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:05,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:05,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:05,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:05,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:05,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:05,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:05,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:30:05,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:30:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:30:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:05,883 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-04 09:30:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:06,088 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 09:30:06,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:30:06,088 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-04 09:30:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:06,089 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:30:06,089 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:30:06,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:30:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:30:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 09:30:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:30:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-04 09:30:06,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-04 09:30:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:06,094 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-04 09:30:06,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:30:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-04 09:30:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:30:06,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:06,095 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 09:30:06,095 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:06,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-04 09:30:06,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:06,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:06,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:06,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:06,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:06,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:06,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:06,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:06,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:06,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:30:06,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:30:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:30:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:06,221 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-04 09:30:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:06,314 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-04 09:30:06,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:30:06,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:30:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:06,315 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:30:06,315 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:30:06,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:30:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:30:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:30:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 09:30:06,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-04 09:30:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:06,319 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 09:30:06,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:30:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 09:30:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:30:06,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:06,320 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 09:30:06,320 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:06,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-04 09:30:06,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:06,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:06,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:06,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:06,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:06,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:06,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:30:06,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:06,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:06,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:30:06,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:30:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:30:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:06,534 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 09:30:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:06,582 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 09:30:06,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:30:06,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 09:30:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:06,583 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:30:06,583 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:30:06,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:30:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:30:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:30:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-04 09:30:06,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-04 09:30:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:06,587 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-04 09:30:06,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:30:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-04 09:30:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:30:06,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:06,588 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:30:06,588 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:06,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-04 09:30:06,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:06,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:06,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:06,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:06,746 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:06,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:06,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:06,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:30:06,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:30:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:30:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:06,839 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-04 09:30:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:07,062 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-04 09:30:07,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:30:07,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-04 09:30:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:07,063 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:30:07,064 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:30:07,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:30:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:30:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-04 09:30:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:30:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 09:30:07,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 09:30:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:07,069 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 09:30:07,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:30:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 09:30:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:30:07,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:07,070 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 09:30:07,070 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:07,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-04 09:30:07,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:07,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:07,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:07,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:07,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:07,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:07,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 09:30:07,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:07,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:07,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:30:07,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:30:07,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:30:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:07,267 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-04 09:30:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:07,360 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-04 09:30:07,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:30:07,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:30:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:07,361 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:30:07,361 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:30:07,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:30:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:30:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:30:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 09:30:07,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-04 09:30:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:07,365 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 09:30:07,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:30:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 09:30:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:30:07,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:07,366 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 09:30:07,366 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:07,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:07,367 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-04 09:30:07,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:07,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:07,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:07,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:07,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:07,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:07,508 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:30:07,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:07,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:07,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:30:07,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:30:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:30:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:07,548 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 09:30:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:07,611 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-04 09:30:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:30:07,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 09:30:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:07,612 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:30:07,613 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:30:07,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:30:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:30:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:30:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-04 09:30:07,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-04 09:30:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:07,618 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-04 09:30:07,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:30:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-04 09:30:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:30:07,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:07,619 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:30:07,619 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:07,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-04 09:30:07,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:07,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:07,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:07,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:07,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:07,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:07,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:07,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:07,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:30:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:30:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:30:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:07,932 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-04 09:30:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:08,205 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 09:30:08,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:30:08,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-04 09:30:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:08,206 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:30:08,206 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:30:08,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:30:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:30:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-04 09:30:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:30:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 09:30:08,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-04 09:30:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:08,210 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 09:30:08,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:30:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 09:30:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:30:08,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:08,211 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 09:30:08,211 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:08,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:08,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-04 09:30:08,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:08,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:08,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:08,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:08,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:08,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:08,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:08,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:08,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:08,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:08,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:08,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:08,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:08,563 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-04 09:30:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:08,615 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-04 09:30:08,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:08,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:30:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:08,616 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:30:08,616 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:30:08,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:30:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:30:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:30:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 09:30:08,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-04 09:30:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:08,621 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 09:30:08,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 09:30:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:30:08,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:08,622 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 09:30:08,623 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:08,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:08,623 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-04 09:30:08,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:08,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:08,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:08,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:08,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:08,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:08,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:08,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:30:08,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:08,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:08,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:08,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:08,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:08,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:08,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:08,930 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-04 09:30:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:08,974 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 09:30:08,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:08,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 09:30:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:08,975 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:30:08,975 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:30:08,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:30:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:30:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:30:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-04 09:30:08,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-04 09:30:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:08,979 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-04 09:30:08,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-04 09:30:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:30:08,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:08,980 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:30:08,981 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:08,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-04 09:30:08,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:08,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:09,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:09,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:09,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:09,189 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:09,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:09,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:09,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:09,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:30:09,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:30:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:30:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:09,228 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-04 09:30:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:09,649 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-04 09:30:09,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:30:09,650 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-04 09:30:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:09,651 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:30:09,651 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:30:09,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:30:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:30:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-04 09:30:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:30:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 09:30:09,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-04 09:30:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:09,657 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 09:30:09,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:30:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 09:30:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:30:09,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:09,658 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 09:30:09,658 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:09,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-04 09:30:09,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:09,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:09,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:09,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:09,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:10,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:10,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:10,119 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:30:10,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:10,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:10,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:30:10,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:30:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:30:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:10,159 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-04 09:30:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:10,253 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-04 09:30:10,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:30:10,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 09:30:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:10,254 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:30:10,254 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:30:10,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:30:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:30:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:30:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 09:30:10,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-04 09:30:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:10,259 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 09:30:10,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:30:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 09:30:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:30:10,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:10,260 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 09:30:10,260 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:10,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-04 09:30:10,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:10,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:10,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:10,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:10,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:10,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:10,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 09:30:10,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:10,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:10,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:30:10,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:30:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:30:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:10,601 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 09:30:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:10,638 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-04 09:30:10,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:30:10,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 09:30:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:10,639 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:30:10,640 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:30:10,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:30:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:30:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:30:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-04 09:30:10,645 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-04 09:30:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:10,645 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-04 09:30:10,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:30:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-04 09:30:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:30:10,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:10,646 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:30:10,646 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:10,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-04 09:30:10,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:10,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:10,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:10,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:10,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:10,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:10,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:10,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:10,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:30:10,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:30:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:30:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:10,962 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-04 09:30:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:11,176 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 09:30:11,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:30:11,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-04 09:30:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:11,178 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:30:11,178 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:30:11,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:30:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:30:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 09:30:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:30:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 09:30:11,183 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-04 09:30:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:11,183 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 09:30:11,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:30:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 09:30:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:30:11,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:11,184 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 09:30:11,184 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:11,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-04 09:30:11,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:11,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:11,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:11,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:11,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:11,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:11,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:11,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:11,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:11,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:30:11,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:30:11,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:30:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:11,336 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-04 09:30:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:11,448 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-04 09:30:11,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:30:11,449 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 09:30:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:11,450 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:30:11,450 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:30:11,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:30:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:30:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:30:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 09:30:11,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-04 09:30:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:11,454 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 09:30:11,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:30:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 09:30:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:30:11,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:11,455 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 09:30:11,455 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:11,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-04 09:30:11,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:11,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:11,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:11,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:11,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:11,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:11,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:30:11,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:11,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:11,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:30:11,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:30:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:30:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:11,776 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-04 09:30:11,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:11,819 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 09:30:11,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:30:11,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 09:30:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:11,820 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:30:11,820 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:30:11,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:30:11,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:30:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:30:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-04 09:30:11,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-04 09:30:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:11,825 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-04 09:30:11,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:30:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-04 09:30:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:30:11,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:11,826 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:30:11,826 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:11,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:11,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-04 09:30:11,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:11,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:11,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:11,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:12,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:12,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:12,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:12,590 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:12,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:12,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:12,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:12,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:30:12,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:30:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:30:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:12,621 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-04 09:30:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:12,815 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-04 09:30:12,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:30:12,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-04 09:30:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:12,816 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:30:12,817 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:30:12,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:30:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:30:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-04 09:30:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:30:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 09:30:12,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-04 09:30:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:12,822 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 09:30:12,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:30:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 09:30:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:30:12,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:12,823 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 09:30:12,823 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:12,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-04 09:30:12,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:12,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:12,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:13,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:13,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:13,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:30:13,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:13,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:13,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:30:13,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:30:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:30:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:13,108 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 09:30:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:13,226 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-04 09:30:13,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:30:13,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 09:30:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:13,227 INFO L225 Difference]: With dead ends: 42 [2018-10-04 09:30:13,227 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:30:13,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:30:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:30:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:30:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 09:30:13,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-04 09:30:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:13,231 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 09:30:13,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:30:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 09:30:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:30:13,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:13,232 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 09:30:13,232 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:13,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-04 09:30:13,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:13,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:13,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:13,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:13,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:13,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:13,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:13,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:30:13,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:13,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:13,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:30:13,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:30:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:30:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:13,517 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 09:30:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:13,610 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-04 09:30:13,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:30:13,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 09:30:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:13,610 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:30:13,610 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:30:13,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:30:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:30:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:30:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-04 09:30:13,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-04 09:30:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:13,618 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-04 09:30:13,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:30:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-04 09:30:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:30:13,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:13,619 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:30:13,619 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:13,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-04 09:30:13,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:13,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:13,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:13,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:13,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:13,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:13,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:30:13,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:30:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:30:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:13,990 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-04 09:30:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:14,269 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 09:30:14,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:30:14,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 09:30:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:14,270 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:30:14,270 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:30:14,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:30:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:30:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 09:30:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 09:30:14,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-04 09:30:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:14,276 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 09:30:14,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:30:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 09:30:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:30:14,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:14,277 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 09:30:14,277 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:14,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-04 09:30:14,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:14,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:14,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:14,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:14,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:14,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:14,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:14,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:14,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:14,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:30:14,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:30:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:30:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:14,742 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-04 09:30:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:14,838 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-04 09:30:14,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:30:14,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 09:30:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:14,839 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:30:14,839 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:30:14,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:30:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:30:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:30:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 09:30:14,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-04 09:30:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:14,844 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 09:30:14,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:30:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 09:30:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:30:14,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:14,845 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 09:30:14,845 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:14,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-04 09:30:14,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:14,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:14,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:14,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:15,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:15,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:30:15,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:15,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:15,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:30:15,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:30:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:30:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:15,116 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-04 09:30:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:15,416 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 09:30:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:30:15,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 09:30:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:15,417 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:30:15,417 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:30:15,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:30:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:30:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:30:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-04 09:30:15,420 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-04 09:30:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:15,420 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-04 09:30:15,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:30:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-04 09:30:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:30:15,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:15,421 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:30:15,421 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:15,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-04 09:30:15,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:15,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:15,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:15,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:15,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:15,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:15,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:15,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:15,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:15,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:15,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:15,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:30:15,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:30:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:30:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:15,865 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-04 09:30:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:16,110 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-04 09:30:16,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:30:16,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-04 09:30:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:16,112 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:16,112 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:30:16,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:30:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:30:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-04 09:30:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 09:30:16,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 09:30:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:16,115 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 09:30:16,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:30:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 09:30:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:30:16,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:16,116 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 09:30:16,116 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:16,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-04 09:30:16,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:16,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:16,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:16,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:16,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:16,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:16,621 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:16,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:30:16,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:16,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:16,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:16,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:30:16,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:30:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:30:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:16,679 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-04 09:30:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:16,809 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-04 09:30:16,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:30:16,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 09:30:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:16,810 INFO L225 Difference]: With dead ends: 48 [2018-10-04 09:30:16,810 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:30:16,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:30:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:30:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:30:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 09:30:16,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-04 09:30:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:16,813 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 09:30:16,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:30:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 09:30:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:30:16,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:16,814 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 09:30:16,814 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:16,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:16,814 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-04 09:30:16,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:16,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:16,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:16,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:16,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:16,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:16,991 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:17,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 09:30:17,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:17,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:17,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:30:17,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:30:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:30:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:17,038 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 09:30:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:17,084 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-04 09:30:17,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:30:17,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 09:30:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:17,086 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:30:17,086 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:30:17,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:30:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:30:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:30:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-04 09:30:17,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-04 09:30:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:17,090 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-04 09:30:17,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:30:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-04 09:30:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:30:17,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:17,090 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:30:17,091 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:17,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-04 09:30:17,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:17,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:17,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:17,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:17,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:17,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:17,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:17,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:30:17,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:30:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:30:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:17,386 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-04 09:30:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:17,644 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 09:30:17,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:30:17,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-04 09:30:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:17,645 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:30:17,645 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:17,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:30:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 09:30:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 09:30:17,650 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-04 09:30:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:17,650 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 09:30:17,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:30:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 09:30:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:30:17,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:17,651 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 09:30:17,651 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:17,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-04 09:30:17,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:17,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:17,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:17,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:17,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:17,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:17,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:17,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:17,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:17,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:17,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:30:17,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:30:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:30:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:17,931 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-04 09:30:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:18,046 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-04 09:30:18,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:30:18,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 09:30:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:18,047 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:18,047 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:30:18,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:30:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:30:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:30:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 09:30:18,051 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-04 09:30:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:18,051 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 09:30:18,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:30:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 09:30:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:30:18,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:18,051 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 09:30:18,052 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:18,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-04 09:30:18,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:18,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:18,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:18,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:18,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:18,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:18,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:30:18,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:18,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:18,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:30:18,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:30:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:30:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:18,249 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-04 09:30:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:18,392 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 09:30:18,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:30:18,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 09:30:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:18,393 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:30:18,393 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:30:18,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:30:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:30:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:30:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-04 09:30:18,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-04 09:30:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:18,397 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-04 09:30:18,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:30:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-04 09:30:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:30:18,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:18,397 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:30:18,397 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:18,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-04 09:30:18,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:18,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:18,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:18,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:18,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:18,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:18,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:18,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:18,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:18,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:30:18,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:30:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:30:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:18,731 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-04 09:30:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:19,051 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-04 09:30:19,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:30:19,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-04 09:30:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:19,052 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:19,052 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:30:19,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:30:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:30:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-04 09:30:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:30:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 09:30:19,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-04 09:30:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:19,057 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 09:30:19,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:30:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 09:30:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:30:19,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:19,058 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 09:30:19,058 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:19,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-04 09:30:19,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:19,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:19,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:19,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:19,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:19,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:19,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:30:19,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:19,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:19,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:19,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:30:19,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:30:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:30:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:19,501 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-04 09:30:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:19,604 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-04 09:30:19,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:30:19,604 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 09:30:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:19,605 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:30:19,605 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:30:19,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:30:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:30:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:30:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 09:30:19,610 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-04 09:30:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:19,611 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 09:30:19,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:30:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 09:30:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:30:19,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:19,611 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 09:30:19,611 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:19,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-04 09:30:19,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:19,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:19,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:19,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:20,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:20,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:20,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:20,239 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:30:20,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:20,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:20,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:20,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:30:20,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:30:20,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:30:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:20,269 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 09:30:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:20,347 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-04 09:30:20,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:30:20,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 09:30:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:20,349 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:30:20,349 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:30:20,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:30:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:30:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:30:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-04 09:30:20,352 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-04 09:30:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:20,353 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-04 09:30:20,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:30:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-04 09:30:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:30:20,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:20,353 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:30:20,354 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:20,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-04 09:30:20,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:20,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:20,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:20,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:20,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:20,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:20,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:20,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:20,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:20,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:20,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:30:20,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:30:20,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:30:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:20,753 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-04 09:30:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:21,344 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 09:30:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:30:21,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-04 09:30:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:21,346 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:30:21,346 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:21,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:30:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-04 09:30:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:30:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 09:30:21,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-04 09:30:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:21,351 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 09:30:21,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:30:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 09:30:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:30:21,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:21,351 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 09:30:21,352 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:21,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-04 09:30:21,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:21,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:21,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:21,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:21,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:21,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:21,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:21,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:21,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:21,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:30:21,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:30:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:30:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:21,607 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-04 09:30:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:21,748 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-04 09:30:21,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:30:21,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 09:30:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:21,749 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:21,749 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:30:21,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:30:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:30:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:30:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 09:30:21,752 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-04 09:30:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:21,752 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 09:30:21,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:30:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 09:30:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:30:21,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:21,752 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 09:30:21,753 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:21,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-04 09:30:21,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:21,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:21,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:21,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:22,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:22,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:22,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:30:22,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:22,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:22,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:30:22,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:30:22,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:30:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:22,174 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-04 09:30:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:22,242 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 09:30:22,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:30:22,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 09:30:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:22,244 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:30:22,244 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:30:22,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:22,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:30:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:30:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:30:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-04 09:30:22,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-04 09:30:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:22,248 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-04 09:30:22,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:30:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-04 09:30:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:30:22,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:22,249 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:30:22,249 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:22,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-04 09:30:22,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:22,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:22,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:22,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:22,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:22,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:22,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:22,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:22,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:30:22,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:30:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:30:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:22,619 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-04 09:30:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:23,315 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-04 09:30:23,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:30:23,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-04 09:30:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:23,317 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:30:23,317 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:30:23,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:30:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:30:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-04 09:30:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:30:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 09:30:23,321 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-04 09:30:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:23,321 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 09:30:23,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:30:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 09:30:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:30:23,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:23,322 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 09:30:23,322 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:23,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-04 09:30:23,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:23,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:23,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:23,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:23,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:23,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:23,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:23,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:23,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:30:23,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:23,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:23,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:23,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:30:23,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:30:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:30:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:23,624 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-04 09:30:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:24,121 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-04 09:30:24,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:30:24,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 09:30:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:24,122 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:30:24,122 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:30:24,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:30:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:30:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:30:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 09:30:24,125 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-04 09:30:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:24,125 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 09:30:24,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:30:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 09:30:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:30:24,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:24,126 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 09:30:24,126 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:24,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-04 09:30:24,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:24,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:24,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:24,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:24,350 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:30:24,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:24,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:24,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:30:24,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:30:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:30:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:24,380 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 09:30:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:24,455 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-04 09:30:24,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:30:24,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 09:30:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:24,457 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:30:24,457 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:30:24,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:30:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:30:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:30:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-04 09:30:24,461 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-04 09:30:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:24,461 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-04 09:30:24,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:30:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-04 09:30:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:30:24,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:24,462 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:30:24,462 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:24,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-04 09:30:24,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:24,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:24,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:24,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:24,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:24,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:24,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:24,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:30:24,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:30:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:30:24,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:24,999 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-04 09:30:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:25,461 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 09:30:25,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:30:25,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-04 09:30:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:25,463 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:30:25,463 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:25,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:30:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-04 09:30:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:30:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 09:30:25,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-04 09:30:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:25,468 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 09:30:25,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:30:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 09:30:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:30:25,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:25,469 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 09:30:25,469 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:25,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-04 09:30:25,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:25,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:25,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:25,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:25,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:25,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:25,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:25,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:25,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:25,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:25,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:25,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:25,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:30:25,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:30:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:30:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:25,828 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-04 09:30:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:25,992 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-04 09:30:25,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:30:25,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 09:30:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:25,993 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:30:25,993 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:30:25,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:30:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:30:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:30:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 09:30:25,998 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-04 09:30:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:25,998 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 09:30:25,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:30:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 09:30:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:30:25,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:25,999 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 09:30:25,999 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:25,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-04 09:30:25,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:26,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:26,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:26,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:26,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:26,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:26,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:26,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:30:26,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:26,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:26,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:26,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:30:26,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:30:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:30:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:26,510 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-04 09:30:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:26,569 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 09:30:26,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:30:26,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 09:30:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:26,570 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:30:26,571 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:30:26,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:30:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:30:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:30:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-04 09:30:26,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-04 09:30:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:26,575 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-04 09:30:26,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:30:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-04 09:30:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:30:26,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:26,576 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:30:26,576 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:26,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-04 09:30:26,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:26,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:26,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:26,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:27,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:27,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:27,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:27,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:27,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:27,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:27,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:27,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:30:27,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:30:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:30:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:27,239 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-04 09:30:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:27,707 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-04 09:30:27,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:30:27,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-04 09:30:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:27,708 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:30:27,708 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:30:27,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:30:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:30:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-04 09:30:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:30:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-04 09:30:27,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-04 09:30:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:27,712 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-04 09:30:27,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:30:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-04 09:30:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:30:27,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:27,713 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 09:30:27,713 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:27,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-04 09:30:27,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:27,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:27,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:27,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:28,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:28,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:28,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:28,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-04 09:30:28,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:28,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:28,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:28,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:30:28,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:30:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:30:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:28,435 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-04 09:30:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:28,558 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-04 09:30:28,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:30:28,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 09:30:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:28,559 INFO L225 Difference]: With dead ends: 66 [2018-10-04 09:30:28,559 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:30:28,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:30:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:30:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:30:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 09:30:28,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-04 09:30:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:28,563 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 09:30:28,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:30:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 09:30:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:30:28,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:28,563 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 09:30:28,563 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:28,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-04 09:30:28,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:28,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:28,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:28,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:28,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:30,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:30,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:30,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:30,247 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 09:30:30,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:30,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:30,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:30,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:30:30,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:30:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:30:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:30,281 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 09:30:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:30,344 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-04 09:30:30,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:30:30,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 09:30:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:30,345 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:30:30,345 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:30:30,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:30:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:30:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:30:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-04 09:30:30,349 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-04 09:30:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:30,349 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-04 09:30:30,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:30:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-04 09:30:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:30:30,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:30,350 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:30:30,350 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:30,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-04 09:30:30,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:30,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:30,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:30,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:30,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:30,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:30,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:30,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:30,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:30,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:30,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:30:30,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:30:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:30:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:30,825 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-04 09:30:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:31,393 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 09:30:31,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:30:31,393 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-04 09:30:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:31,394 INFO L225 Difference]: With dead ends: 68 [2018-10-04 09:30:31,394 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:30:31,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:30:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:30:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-04 09:30:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:30:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 09:30:31,400 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-04 09:30:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:31,400 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 09:30:31,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:30:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 09:30:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:30:31,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:31,401 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 09:30:31,401 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:31,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-04 09:30:31,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:31,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:31,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:31,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:31,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:32,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:32,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:32,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:32,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:32,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:32,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:32,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:32,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:30:32,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:30:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:30:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:32,529 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-04 09:30:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:32,683 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-04 09:30:32,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:30:32,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 09:30:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:32,684 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:30:32,684 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:30:32,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:30:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:30:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:30:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 09:30:32,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-04 09:30:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:32,688 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 09:30:32,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:30:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 09:30:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:30:32,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:32,689 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 09:30:32,689 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:32,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-04 09:30:32,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:32,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:32,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:32,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:32,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:32,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:32,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:32,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:33,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:30:33,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:33,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:33,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:30:33,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:30:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:30:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:33,036 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-04 09:30:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:33,106 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 09:30:33,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:30:33,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 09:30:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:33,108 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:30:33,108 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:30:33,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:30:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:30:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:30:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-04 09:30:33,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-04 09:30:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:33,113 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-04 09:30:33,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:30:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-04 09:30:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:30:33,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:33,113 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:30:33,113 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:33,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-04 09:30:33,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:33,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:33,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:33,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:33,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:33,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:33,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:33,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:33,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:33,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:33,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:30:33,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:30:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:30:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:33,649 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-04 09:30:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:34,311 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-04 09:30:34,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:30:34,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-04 09:30:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:34,312 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:30:34,312 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:30:34,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:30:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:30:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-04 09:30:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:30:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-04 09:30:34,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-04 09:30:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:34,317 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-04 09:30:34,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:30:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-04 09:30:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:30:34,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:34,318 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 09:30:34,318 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:34,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-04 09:30:34,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:34,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:34,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:34,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:34,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:34,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:34,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:34,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:30:34,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:34,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:34,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:34,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:30:34,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:30:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:30:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:34,717 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-04 09:30:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:34,940 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-04 09:30:34,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:30:34,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 09:30:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:34,941 INFO L225 Difference]: With dead ends: 72 [2018-10-04 09:30:34,941 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:30:34,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:30:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:30:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:30:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 09:30:34,946 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-04 09:30:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:34,946 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 09:30:34,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:30:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 09:30:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:30:34,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:34,947 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 09:30:34,947 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:34,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-04 09:30:34,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:34,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:34,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:34,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:35,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:35,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:35,225 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:35,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 09:30:35,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:35,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:35,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:35,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:30:35,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:30:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:30:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:35,451 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 09:30:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:35,603 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-04 09:30:35,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:30:35,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 09:30:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:35,604 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:30:35,604 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:30:35,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:30:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:30:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:30:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-04 09:30:35,608 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-04 09:30:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:35,608 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-04 09:30:35,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:30:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-04 09:30:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:30:35,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:35,609 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:30:35,609 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:35,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:35,609 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-04 09:30:35,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:35,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:35,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:35,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:35,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:36,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:36,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:36,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:36,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:36,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:36,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:30:36,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:30:36,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:30:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:36,084 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-04 09:30:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:36,697 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 09:30:36,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:30:36,697 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-04 09:30:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:36,698 INFO L225 Difference]: With dead ends: 74 [2018-10-04 09:30:36,698 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:30:36,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:30:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:30:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-04 09:30:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:30:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 09:30:36,702 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 09:30:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:36,703 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 09:30:36,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:30:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 09:30:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:30:36,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:36,703 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 09:30:36,704 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:36,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-04 09:30:36,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:36,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:36,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:36,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:36,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:37,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:37,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:37,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:37,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:37,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:37,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:37,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:37,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:30:37,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:30:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:30:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:37,500 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-04 09:30:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:37,615 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-04 09:30:37,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:30:37,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 09:30:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:37,616 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:30:37,616 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:30:37,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:30:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:30:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:30:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 09:30:37,621 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-04 09:30:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:37,621 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 09:30:37,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:30:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 09:30:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:30:37,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:37,622 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 09:30:37,622 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:37,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:37,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-04 09:30:37,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:37,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:37,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:37,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:38,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:38,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:38,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:30:38,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:38,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:38,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:30:38,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:30:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:30:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:38,298 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-04 09:30:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:38,370 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 09:30:38,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:30:38,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 09:30:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:38,371 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:30:38,372 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:30:38,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:30:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:30:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:30:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-04 09:30:38,375 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-04 09:30:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:38,376 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-04 09:30:38,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:30:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-04 09:30:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:30:38,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:38,376 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:30:38,376 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:38,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-04 09:30:38,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:38,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:38,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:38,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:38,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:38,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:38,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:38,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:38,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:38,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:30:38,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:30:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:30:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:38,840 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-04 09:30:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:39,523 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-04 09:30:39,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:30:39,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-04 09:30:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:39,525 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:30:39,525 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:30:39,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:30:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:30:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-04 09:30:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:30:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 09:30:39,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-04 09:30:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:39,529 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 09:30:39,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:30:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 09:30:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:30:39,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:39,529 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 09:30:39,530 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:39,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-04 09:30:39,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:39,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:39,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:39,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:39,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:39,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:39,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:39,878 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:39,919 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:30:39,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:39,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:39,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:39,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:30:39,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:30:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:30:39,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:39,967 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 09:30:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:40,115 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-04 09:30:40,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:30:40,116 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 09:30:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:40,116 INFO L225 Difference]: With dead ends: 78 [2018-10-04 09:30:40,116 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:30:40,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:30:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:30:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:30:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 09:30:40,120 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-04 09:30:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:40,121 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 09:30:40,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:30:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 09:30:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:30:40,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:40,121 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 09:30:40,121 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:40,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-04 09:30:40,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:40,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:40,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:40,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:40,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:40,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:40,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:40,441 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:30:40,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:40,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:40,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:40,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:30:40,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:30:40,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:30:40,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:40,476 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 09:30:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:40,582 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-04 09:30:40,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:30:40,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 09:30:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:40,584 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:30:40,584 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:30:40,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:30:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:30:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:30:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-04 09:30:40,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-04 09:30:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:40,588 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-04 09:30:40,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:30:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-04 09:30:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:30:40,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:40,589 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:30:40,589 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:40,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-04 09:30:40,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:40,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:40,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:40,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:41,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:41,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:41,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:41,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:41,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:41,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:30:41,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:30:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:30:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:41,411 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-04 09:30:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:42,186 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 09:30:42,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:30:42,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 09:30:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:42,187 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:30:42,187 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:30:42,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:30:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:30:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-04 09:30:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:30:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-04 09:30:42,191 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-04 09:30:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:42,191 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-04 09:30:42,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:30:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-04 09:30:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:30:42,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:42,191 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 09:30:42,192 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:42,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:42,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-04 09:30:42,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:42,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:42,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:42,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:42,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:42,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:42,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:42,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:42,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:42,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:42,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:30:42,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:30:42,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:30:42,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:42,688 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-04 09:30:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:42,909 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-04 09:30:42,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:30:42,909 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 09:30:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:42,910 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:30:42,910 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:30:42,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:30:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:30:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:30:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 09:30:42,914 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-04 09:30:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:42,915 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 09:30:42,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:30:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 09:30:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:30:42,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:42,915 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 09:30:42,915 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:42,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-04 09:30:42,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:42,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:42,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:42,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:43,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:43,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:43,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:43,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-04 09:30:43,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:43,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:43,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:43,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:30:43,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:30:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:30:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:43,300 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-04 09:30:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:43,383 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 09:30:43,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:30:43,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 09:30:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:43,384 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:30:43,384 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:30:43,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:30:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:30:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:30:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-04 09:30:43,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-04 09:30:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:43,388 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-04 09:30:43,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:30:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-04 09:30:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:30:43,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:43,389 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:30:43,389 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:43,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-04 09:30:43,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:43,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:44,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:44,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:44,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:44,045 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:44,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:44,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:44,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:44,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:30:44,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:30:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:30:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:44,118 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-04 09:30:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:44,910 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-04 09:30:44,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:30:44,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-04 09:30:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:44,911 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:30:44,911 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:30:44,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:30:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:30:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-04 09:30:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:30:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 09:30:44,917 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 09:30:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 09:30:44,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:30:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 09:30:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:30:44,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:44,918 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 09:30:44,918 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:44,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-04 09:30:44,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:44,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:44,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:44,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:44,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:47,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:47,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:47,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:47,152 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 09:30:47,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:47,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:47,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:47,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:30:47,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:30:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:30:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:47,197 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-04 09:30:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:47,650 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-04 09:30:47,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:30:47,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 09:30:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:47,652 INFO L225 Difference]: With dead ends: 84 [2018-10-04 09:30:47,652 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:30:47,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:30:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:30:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:30:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 09:30:47,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-04 09:30:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:47,658 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 09:30:47,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:30:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 09:30:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:30:47,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:47,659 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 09:30:47,659 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:47,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-04 09:30:47,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:47,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:47,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:47,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:48,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:48,046 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:48,082 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 09:30:48,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:48,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:48,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:30:48,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:30:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:30:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:48,129 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 09:30:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:48,326 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-04 09:30:48,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:30:48,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 09:30:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:48,327 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:30:48,327 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:30:48,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:30:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:30:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:30:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-04 09:30:48,331 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-04 09:30:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:48,331 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-04 09:30:48,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:30:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-04 09:30:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:30:48,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:48,332 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:30:48,332 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:48,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-04 09:30:48,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:48,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:48,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:48,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:48,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:48,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:48,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:48,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:48,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:48,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:30:48,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:30:48,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:30:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:48,886 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-04 09:30:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:49,739 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 09:30:49,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:30:49,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-04 09:30:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:49,740 INFO L225 Difference]: With dead ends: 86 [2018-10-04 09:30:49,741 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:30:49,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:30:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:30:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-04 09:30:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:30:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 09:30:49,746 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-04 09:30:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:49,746 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 09:30:49,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:30:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 09:30:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:30:49,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:49,747 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 09:30:49,747 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:49,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-04 09:30:49,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:49,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:49,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:50,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:50,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:50,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:50,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:50,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:50,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:50,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:50,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:30:50,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:30:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:30:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:50,121 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-04 09:30:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:51,016 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-04 09:30:51,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:30:51,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 09:30:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:51,018 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:30:51,018 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:30:51,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:30:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:30:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:30:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 09:30:51,023 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-04 09:30:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:51,023 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 09:30:51,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:30:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 09:30:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:30:51,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:51,023 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 09:30:51,024 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:51,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:51,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-04 09:30:51,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:51,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:51,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:51,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:51,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:51,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:51,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:51,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:51,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-04 09:30:51,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:51,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:51,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:51,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:30:51,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:30:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:30:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:51,450 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-04 09:30:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:52,214 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 09:30:52,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:30:52,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 09:30:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:52,215 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:30:52,215 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:30:52,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:30:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:30:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:30:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-04 09:30:52,219 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-04 09:30:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:52,219 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-04 09:30:52,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:30:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-04 09:30:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:30:52,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:52,220 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:30:52,220 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:52,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-04 09:30:52,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:52,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:52,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:52,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:53,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:53,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:53,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:53,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:53,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:53,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:53,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:53,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:30:53,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:30:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:30:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:53,803 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-04 09:30:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:54,757 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-04 09:30:54,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:30:54,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-04 09:30:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:54,758 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:30:54,758 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:30:54,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:30:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:30:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-04 09:30:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:30:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 09:30:54,764 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-04 09:30:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:54,764 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 09:30:54,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:30:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 09:30:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:30:54,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:54,765 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 09:30:54,765 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:54,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-04 09:30:54,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:54,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:54,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:54,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:54,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:55,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:55,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:55,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-04 09:30:55,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:55,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:55,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:30:55,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:30:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:30:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:55,244 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-04 09:30:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:55,472 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-04 09:30:55,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:30:55,472 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 09:30:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:55,473 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:30:55,473 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:30:55,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:30:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:30:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:30:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 09:30:55,478 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-04 09:30:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:55,479 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 09:30:55,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:30:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 09:30:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:30:55,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:55,479 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 09:30:55,480 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:55,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-04 09:30:55,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:55,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:55,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:55,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:55,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:30:55,826 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:55,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-04 09:30:55,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:55,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:55,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:30:55,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:30:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:30:55,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:55,895 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 09:30:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:55,973 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-04 09:30:55,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:30:55,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 09:30:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:55,974 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:30:55,974 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:30:55,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:30:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:30:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:30:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-04 09:30:55,978 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-04 09:30:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:55,979 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-04 09:30:55,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:30:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-04 09:30:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:30:55,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:55,980 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-04 09:30:55,980 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:55,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:55,980 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-04 09:30:55,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:55,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:55,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:55,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:55,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:57,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:57,234 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 [2018-10-04 09:30:57,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:57,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:57,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:57,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:30:57,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:30:57,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:30:57,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:57,329 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-04 09:30:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:58,719 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 09:30:58,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:30:58,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-04 09:30:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:58,720 INFO L225 Difference]: With dead ends: 92 [2018-10-04 09:30:58,721 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:30:58,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:30:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:30:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-04 09:30:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:30:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-04 09:30:58,727 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-04 09:30:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:58,727 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-04 09:30:58,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:30:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-04 09:30:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:30:58,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:58,728 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 09:30:58,728 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:58,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-04 09:30:58,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:58,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:58,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:58,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:58,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:59,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:59,064 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 [2018-10-04 09:30:59,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:59,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:59,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:59,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:59,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:59,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:30:59,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:30:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:30:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:30:59,152 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-04 09:30:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:59,413 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-04 09:30:59,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:30:59,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 09:30:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:59,414 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:30:59,415 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:30:59,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:30:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:30:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:30:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:30:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 09:30:59,420 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-04 09:30:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:59,420 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 09:30:59,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:30:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 09:30:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:30:59,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:59,421 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 09:30:59,421 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:59,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-04 09:30:59,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:59,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:59,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:00,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:00,199 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 [2018-10-04 09:31:00,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:00,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:31:00,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:00,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:00,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:00,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:31:00,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:31:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:31:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:31:00,285 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-04 09:31:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:00,425 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 09:31:00,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:31:00,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 09:31:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:00,426 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:31:00,427 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:31:00,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:31:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:31:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:31:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:31:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-04 09:31:00,432 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-04 09:31:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:00,432 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-04 09:31:00,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:31:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-04 09:31:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:31:00,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:00,433 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-04 09:31:00,433 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:00,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-04 09:31:00,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:00,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:00,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:00,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:00,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:00,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:00,946 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 [2018-10-04 09:31:00,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:01,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:01,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:01,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:01,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:01,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:31:01,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:31:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:31:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:31:01,102 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-04 09:31:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:02,194 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-04 09:31:02,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:31:02,195 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-04 09:31:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:02,196 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:31:02,196 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:31:02,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:31:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:31:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-04 09:31:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:31:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 09:31:02,202 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-04 09:31:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:02,202 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 09:31:02,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:31:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 09:31:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:31:02,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:02,203 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 09:31:02,203 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:02,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:02,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-04 09:31:02,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:02,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:02,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:02,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:02,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:03,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:03,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:03,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:03,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:31:03,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:03,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:03,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:03,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:31:03,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:31:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:31:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:03,372 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-04 09:31:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:03,607 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-04 09:31:03,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:31:03,607 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 09:31:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:03,608 INFO L225 Difference]: With dead ends: 96 [2018-10-04 09:31:03,609 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:31:03,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:31:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:31:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:31:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 09:31:03,614 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-04 09:31:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:03,614 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 09:31:03,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:31:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 09:31:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:31:03,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:03,615 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 09:31:03,615 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:03,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-04 09:31:03,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:03,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:03,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:03,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:03,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:04,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:04,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:04,173 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:04,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:31:04,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:04,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:04,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:04,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:31:04,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:31:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:31:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:04,337 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 09:31:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:04,441 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-04 09:31:04,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:31:04,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 09:31:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:04,443 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:31:04,443 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:31:04,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:31:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:31:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:31:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-04 09:31:04,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-04 09:31:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:04,448 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-04 09:31:04,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:31:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-04 09:31:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:31:04,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:04,448 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-04 09:31:04,448 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:04,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-04 09:31:04,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:04,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:04,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:04,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:04,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:05,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:05,027 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 [2018-10-04 09:31:05,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:05,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:05,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:05,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:31:05,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:31:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:31:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:05,147 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-04 09:31:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:06,303 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 09:31:06,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:31:06,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-04 09:31:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:06,305 INFO L225 Difference]: With dead ends: 98 [2018-10-04 09:31:06,305 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:31:06,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:31:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:31:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-04 09:31:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:31:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 09:31:06,311 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-04 09:31:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:06,312 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 09:31:06,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:31:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 09:31:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:31:06,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:06,312 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 09:31:06,313 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:06,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-04 09:31:06,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:06,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:06,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:06,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:06,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:06,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:06,895 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 [2018-10-04 09:31:06,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:06,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:06,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:06,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:06,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:06,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:31:06,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:31:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:31:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:06,984 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-04 09:31:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:07,290 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-04 09:31:07,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:31:07,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 09:31:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:07,291 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:31:07,291 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:31:07,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:31:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:31:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:31:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 09:31:07,296 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-04 09:31:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:07,296 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 09:31:07,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:31:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 09:31:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:31:07,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:07,297 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 09:31:07,297 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:07,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-04 09:31:07,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:07,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:07,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:07,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:07,679 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 [2018-10-04 09:31:07,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:07,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:31:07,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:07,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:07,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:07,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:31:07,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:31:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:31:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:07,771 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-04 09:31:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:07,924 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 09:31:07,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:31:07,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 09:31:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:07,925 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:31:07,925 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:31:07,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:31:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:31:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:31:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-04 09:31:07,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-04 09:31:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:07,928 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-04 09:31:07,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:31:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-04 09:31:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:31:07,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:07,929 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-04 09:31:07,929 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:07,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-04 09:31:07,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:07,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:07,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:08,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:08,538 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 [2018-10-04 09:31:08,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:08,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:08,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:08,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:08,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:08,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:31:08,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:31:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:31:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:08,632 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-04 09:31:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:09,849 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-04 09:31:09,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:31:09,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-04 09:31:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:09,850 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:31:09,851 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:31:09,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:31:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:31:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-04 09:31:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:31:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 09:31:09,855 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 09:31:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:09,855 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 09:31:09,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:31:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 09:31:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:31:09,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:09,856 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 09:31:09,856 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:09,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-04 09:31:09,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:09,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:09,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:10,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:10,253 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 [2018-10-04 09:31:10,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:10,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-04 09:31:10,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:10,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:10,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:10,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:31:10,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:31:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:31:10,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:10,362 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-04 09:31:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:10,816 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-04 09:31:10,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:31:10,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 09:31:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:10,817 INFO L225 Difference]: With dead ends: 102 [2018-10-04 09:31:10,817 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:31:10,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:31:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:31:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:31:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 09:31:10,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-04 09:31:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:10,823 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 09:31:10,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:31:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 09:31:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:31:10,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:10,823 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 09:31:10,823 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:10,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-04 09:31:10,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:10,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:10,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:10,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:10,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:11,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:11,277 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 [2018-10-04 09:31:11,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:11,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 09:31:11,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:11,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:11,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:11,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:31:11,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:31:11,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:31:11,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:11,367 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 09:31:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:11,485 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-04 09:31:11,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:31:11,485 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 09:31:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:11,486 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:31:11,486 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:31:11,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:31:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:31:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:31:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-04 09:31:11,492 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-04 09:31:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:11,492 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-04 09:31:11,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:31:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-04 09:31:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:31:11,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:11,493 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-04 09:31:11,493 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:11,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-04 09:31:11,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:11,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:11,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:11,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:11,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:12,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:12,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:12,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:12,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:12,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:12,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:31:12,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:31:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:31:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:12,228 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-04 09:31:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:13,972 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 09:31:13,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:31:13,973 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-04 09:31:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:13,973 INFO L225 Difference]: With dead ends: 104 [2018-10-04 09:31:13,974 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:31:13,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:31:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:31:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-04 09:31:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:31:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 09:31:13,979 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-04 09:31:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:13,979 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 09:31:13,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:31:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 09:31:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:31:13,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:13,979 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 09:31:13,979 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:13,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-04 09:31:13,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:13,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:13,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:13,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:13,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:14,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:14,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:14,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:14,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:14,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:14,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:14,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:14,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:31:14,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:31:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:31:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:14,517 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-04 09:31:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:16,077 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-04 09:31:16,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:31:16,077 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 09:31:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:16,078 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:31:16,078 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:31:16,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:31:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:31:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:31:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 09:31:16,084 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-04 09:31:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:16,085 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 09:31:16,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:31:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 09:31:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:31:16,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:16,085 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 09:31:16,086 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:16,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-04 09:31:16,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:16,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:16,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:16,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:16,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:16,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:16,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:16,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:16,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 09:31:16,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:16,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:16,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:16,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:31:16,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:31:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:31:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:16,672 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-04 09:31:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:16,798 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 09:31:16,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:31:16,799 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 09:31:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:16,799 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:31:16,799 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:31:16,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:31:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:31:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:31:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-04 09:31:16,805 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-04 09:31:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:16,805 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-04 09:31:16,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:31:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-04 09:31:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:31:16,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:16,806 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-04 09:31:16,806 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:16,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:16,806 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-04 09:31:16,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:16,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:16,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:16,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:16,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:17,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:17,545 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 [2018-10-04 09:31:17,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:17,611 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:17,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:17,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:17,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:17,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:31:17,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:31:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:31:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:17,661 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-04 09:31:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:19,190 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-04 09:31:19,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:31:19,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-04 09:31:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:19,191 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:31:19,191 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:31:19,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:31:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:31:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-04 09:31:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:31:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-04 09:31:19,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-04 09:31:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:19,197 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-04 09:31:19,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:31:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-04 09:31:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:31:19,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:19,198 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 09:31:19,198 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:19,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-04 09:31:19,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:19,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:19,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:19,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:19,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:19,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:19,614 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 [2018-10-04 09:31:19,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:19,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:31:19,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:19,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:19,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:19,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:31:19,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:31:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:31:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:19,714 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-04 09:31:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:20,034 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-04 09:31:20,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:31:20,034 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 09:31:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:20,035 INFO L225 Difference]: With dead ends: 108 [2018-10-04 09:31:20,035 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:31:20,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:31:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:31:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:31:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 09:31:20,041 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-04 09:31:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:20,041 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 09:31:20,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:31:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 09:31:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:31:20,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:20,042 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 09:31:20,042 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:20,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-04 09:31:20,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:20,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:20,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:20,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:20,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:20,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:20,503 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 [2018-10-04 09:31:20,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:20,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-04 09:31:20,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:20,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:20,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:20,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:31:20,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:31:20,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:31:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:20,618 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 09:31:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:20,732 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-04 09:31:20,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:31:20,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 09:31:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:20,733 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:31:20,734 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:31:20,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:31:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:31:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:31:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-04 09:31:20,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-04 09:31:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:20,740 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-04 09:31:20,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:31:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-04 09:31:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:31:20,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:20,741 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-04 09:31:20,741 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:20,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-04 09:31:20,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:20,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:20,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:20,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:20,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:21,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:21,530 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 [2018-10-04 09:31:21,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:21,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:21,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:21,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:31:21,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:31:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:31:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:21,620 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-04 09:31:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:23,099 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 09:31:23,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:31:23,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-04 09:31:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:23,100 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:31:23,100 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:31:23,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:31:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:31:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-04 09:31:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:31:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-04 09:31:23,105 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-04 09:31:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:23,106 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-04 09:31:23,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:31:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-04 09:31:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:31:23,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:23,106 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 09:31:23,107 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:23,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-04 09:31:23,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:23,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:23,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:23,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:23,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:23,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:23,838 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 [2018-10-04 09:31:23,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:23,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:23,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:23,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:23,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:23,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:31:23,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:31:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:31:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:23,939 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-04 09:31:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:24,249 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-04 09:31:24,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:31:24,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 09:31:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:24,250 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:31:24,250 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:31:24,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:31:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:31:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:31:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 09:31:24,256 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-04 09:31:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:24,256 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 09:31:24,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:31:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 09:31:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:31:24,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:24,256 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 09:31:24,257 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:24,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-04 09:31:24,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:24,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:24,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:24,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:24,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:24,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:24,801 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 [2018-10-04 09:31:24,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:24,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:31:24,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:24,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:24,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:24,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:31:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:31:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:31:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:24,895 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-04 09:31:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:25,015 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 09:31:25,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:31:25,015 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 09:31:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:25,016 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:31:25,016 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:31:25,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:31:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:31:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:31:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-04 09:31:25,022 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-04 09:31:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:25,022 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-04 09:31:25,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:31:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-04 09:31:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:31:25,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:25,023 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-04 09:31:25,023 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:25,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-04 09:31:25,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:25,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:25,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:25,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:25,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:25,685 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 [2018-10-04 09:31:25,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:25,736 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:25,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:25,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:25,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:25,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:31:25,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:31:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:31:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:25,779 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-04 09:31:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:27,367 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-04 09:31:27,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:31:27,368 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-04 09:31:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:27,369 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:31:27,369 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:31:27,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:31:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:31:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-04 09:31:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:31:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 09:31:27,374 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-04 09:31:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:27,374 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 09:31:27,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:31:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 09:31:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:31:27,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:27,375 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 09:31:27,375 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:27,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-04 09:31:27,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:27,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:27,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:27,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:27,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:27,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:27,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:27,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:28,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:31:28,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:28,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:28,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:28,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:31:28,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:31:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:31:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:28,062 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-04 09:31:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:28,662 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-04 09:31:28,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:31:28,663 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 09:31:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:28,663 INFO L225 Difference]: With dead ends: 114 [2018-10-04 09:31:28,663 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:31:28,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:31:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:31:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:31:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 09:31:28,670 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-04 09:31:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:28,670 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 09:31:28,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:31:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 09:31:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:31:28,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:28,671 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 09:31:28,671 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:28,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:28,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-04 09:31:28,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:28,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:28,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:28,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:28,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:29,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:29,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:29,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:29,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:31:29,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:29,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:29,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:29,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:31:29,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:31:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:31:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:29,291 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 09:31:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:29,400 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-04 09:31:29,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:31:29,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 09:31:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:29,401 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:31:29,402 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:31:29,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:31:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:31:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:31:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-04 09:31:29,408 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-04 09:31:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:29,408 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-04 09:31:29,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:31:29,409 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-04 09:31:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:31:29,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:29,409 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-04 09:31:29,410 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:29,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-04 09:31:29,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:29,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:29,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:29,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:29,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:30,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:30,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:30,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:30,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:30,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:30,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:31:30,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:31:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:31:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:30,558 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-04 09:31:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:32,158 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 09:31:32,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:31:32,158 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-04 09:31:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:32,159 INFO L225 Difference]: With dead ends: 116 [2018-10-04 09:31:32,160 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:31:32,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:31:32,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:31:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-04 09:31:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:31:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-04 09:31:32,166 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-04 09:31:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:32,166 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-04 09:31:32,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:31:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-04 09:31:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:31:32,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:32,166 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 09:31:32,167 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:32,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-04 09:31:32,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:32,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:32,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:32,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:32,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:32,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:32,697 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 [2018-10-04 09:31:32,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:32,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:32,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:32,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:32,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:32,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:31:32,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:31:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:31:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:32,813 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-04 09:31:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:33,222 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-04 09:31:33,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:31:33,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 09:31:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:33,223 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:31:33,223 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:31:33,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:31:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:31:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:31:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 09:31:33,229 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-04 09:31:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:33,229 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 09:31:33,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:31:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 09:31:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:31:33,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:33,230 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 09:31:33,230 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:33,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-04 09:31:33,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:33,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:33,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:33,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:33,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:33,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:33,928 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 [2018-10-04 09:31:33,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:33,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-04 09:31:33,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:33,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:34,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:34,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:31:34,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:31:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:31:34,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:34,034 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-04 09:31:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:34,200 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 09:31:34,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:31:34,200 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 09:31:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:34,201 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:31:34,201 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:31:34,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:31:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:31:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:31:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-04 09:31:34,206 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-04 09:31:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:34,206 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-04 09:31:34,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:31:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-04 09:31:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:31:34,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:34,207 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-04 09:31:34,207 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:34,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-04 09:31:34,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:34,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:34,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:34,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:34,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:35,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:35,366 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 [2018-10-04 09:31:35,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:35,421 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:35,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:35,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:35,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:35,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:31:35,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:31:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:31:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:35,460 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-04 09:31:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:37,176 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-04 09:31:37,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:31:37,176 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-04 09:31:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:37,177 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:31:37,177 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:31:37,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:31:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:31:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-04 09:31:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:31:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 09:31:37,183 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-04 09:31:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:37,183 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 09:31:37,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:31:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 09:31:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:31:37,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:37,184 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 09:31:37,184 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:37,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-04 09:31:37,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:37,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:37,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:37,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:37,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:38,041 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 [2018-10-04 09:31:38,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:38,104 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-04 09:31:38,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:38,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:38,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:38,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:31:38,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:31:38,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:31:38,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:38,156 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-04 09:31:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:38,814 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-04 09:31:38,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:31:38,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 09:31:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:38,815 INFO L225 Difference]: With dead ends: 120 [2018-10-04 09:31:38,815 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:31:38,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:31:38,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:31:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:31:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 09:31:38,821 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-04 09:31:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:38,821 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 09:31:38,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:31:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 09:31:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:31:38,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:38,822 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 09:31:38,822 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:38,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-04 09:31:38,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:38,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:38,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:38,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:38,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:39,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:39,373 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 [2018-10-04 09:31:39,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:39,435 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 09:31:39,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:39,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:39,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:39,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:31:39,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:31:39,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:31:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:39,490 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 09:31:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:39,637 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-04 09:31:39,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:31:39,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 09:31:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:39,638 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:31:39,638 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:31:39,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:31:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:31:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:31:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-04 09:31:39,645 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-04 09:31:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:39,645 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-04 09:31:39,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:31:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-04 09:31:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:31:39,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:39,646 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-04 09:31:39,646 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:39,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-04 09:31:39,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:39,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:39,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:39,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:39,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:40,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:40,446 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 [2018-10-04 09:31:40,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:40,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:40,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:40,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:31:40,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:31:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:31:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:40,547 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-04 09:31:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:42,360 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 09:31:42,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:31:42,361 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-04 09:31:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:42,362 INFO L225 Difference]: With dead ends: 122 [2018-10-04 09:31:42,362 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:31:42,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:31:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:31:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-04 09:31:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:31:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 09:31:42,369 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-04 09:31:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:42,369 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 09:31:42,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:31:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 09:31:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:31:42,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:42,370 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 09:31:42,370 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:42,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:42,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-04 09:31:42,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:42,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:42,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:42,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:42,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:43,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:43,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:43,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:43,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:43,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:43,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:43,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:43,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:31:43,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:31:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:31:43,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:43,199 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-04 09:31:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:43,624 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-04 09:31:43,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:31:43,624 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 09:31:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:43,625 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:31:43,625 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:31:43,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:31:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:31:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:31:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 09:31:43,631 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-04 09:31:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:43,631 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 09:31:43,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:31:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 09:31:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:31:43,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:43,632 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 09:31:43,632 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:43,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-04 09:31:43,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:43,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:43,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:43,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:43,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:44,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:44,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:44,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:44,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-04 09:31:44,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:44,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:44,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:44,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:31:44,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:31:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:31:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:44,460 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-04 09:31:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:44,575 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 09:31:44,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:31:44,575 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 09:31:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:44,576 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:31:44,576 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:31:44,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:31:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:31:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:31:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-04 09:31:44,582 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-04 09:31:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:44,582 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-04 09:31:44,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:31:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-04 09:31:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:31:44,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:44,583 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-04 09:31:44,583 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:44,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-04 09:31:44,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:44,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:44,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:44,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:44,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:45,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:45,434 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 [2018-10-04 09:31:45,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:45,490 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:45,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:45,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:45,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:45,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:31:45,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:31:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:31:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:45,531 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-04 09:31:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:47,416 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-04 09:31:47,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:31:47,416 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-04 09:31:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:47,417 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:31:47,417 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:31:47,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:31:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:31:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-04 09:31:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:31:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 09:31:47,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-04 09:31:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:47,423 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 09:31:47,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:31:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 09:31:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:31:47,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:47,423 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 09:31:47,423 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:47,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:47,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-04 09:31:47,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:47,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:47,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:47,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:47,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:48,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:48,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:48,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:48,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-04 09:31:48,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:48,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:48,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:48,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:31:48,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:31:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:31:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:48,236 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-04 09:31:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:48,722 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-04 09:31:48,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:31:48,722 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 09:31:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:48,723 INFO L225 Difference]: With dead ends: 126 [2018-10-04 09:31:48,723 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:31:48,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:31:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:31:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:31:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 09:31:48,729 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-04 09:31:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:48,730 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 09:31:48,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:31:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 09:31:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:31:48,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:48,730 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 09:31:48,731 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:48,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-04 09:31:48,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:48,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:48,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:48,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:48,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:49,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:49,399 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 [2018-10-04 09:31:49,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:49,462 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 09:31:49,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:49,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:49,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:49,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:31:49,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:31:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:31:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:49,500 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 09:31:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:49,616 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-04 09:31:49,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:31:49,616 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 09:31:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:49,617 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:31:49,617 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:31:49,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:31:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:31:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:31:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-04 09:31:49,624 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-04 09:31:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:49,624 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-04 09:31:49,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:31:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-04 09:31:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:31:49,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:49,625 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-04 09:31:49,625 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:49,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-04 09:31:49,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:49,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:49,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:49,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:49,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:50,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:50,465 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 [2018-10-04 09:31:50,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:50,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:50,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:50,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:31:50,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:31:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:31:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:50,566 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-04 09:31:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:52,531 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 09:31:52,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:31:52,532 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-04 09:31:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:52,532 INFO L225 Difference]: With dead ends: 128 [2018-10-04 09:31:52,532 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 09:31:52,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:31:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 09:31:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-04 09:31:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:31:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 09:31:52,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 09:31:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:52,540 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 09:31:52,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:31:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 09:31:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:31:52,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:52,540 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 09:31:52,541 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:52,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-04 09:31:52,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:52,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:52,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:53,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:53,193 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 [2018-10-04 09:31:53,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:53,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:53,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:53,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:53,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:53,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:31:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:31:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:31:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:53,288 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-04 09:31:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:53,638 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-04 09:31:53,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:31:53,638 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 09:31:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:53,639 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:31:53,639 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:31:53,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:31:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:31:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:31:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 09:31:53,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-04 09:31:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:53,646 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 09:31:53,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:31:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 09:31:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:31:53,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:53,647 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 09:31:53,647 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:53,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-04 09:31:53,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:53,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:53,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:53,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:53,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:54,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:54,451 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 [2018-10-04 09:31:54,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:31:54,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:31:54,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:54,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:54,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:54,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:31:54,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:31:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:31:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:54,557 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-04 09:31:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:54,693 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 09:31:54,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:31:54,693 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 09:31:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:54,694 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:31:54,694 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:31:54,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:31:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:31:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:31:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-04 09:31:54,701 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-04 09:31:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:54,701 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-04 09:31:54,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:31:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-04 09:31:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:31:54,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:54,702 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-04 09:31:54,702 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:54,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-04 09:31:54,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:54,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:54,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:54,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:54,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:55,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:55,614 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 [2018-10-04 09:31:55,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:55,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:55,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:55,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:55,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:55,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:31:55,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:31:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:31:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:55,732 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-04 09:31:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:57,829 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-04 09:31:57,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:31:57,830 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-04 09:31:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:57,830 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:31:57,830 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:31:57,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:31:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:31:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-04 09:31:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:31:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 09:31:57,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-04 09:31:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:57,838 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 09:31:57,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:31:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 09:31:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:31:57,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:57,838 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 09:31:57,839 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:57,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-04 09:31:57,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:57,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:57,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:58,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:58,570 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 [2018-10-04 09:31:58,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:58,643 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:31:58,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:58,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:58,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:58,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:31:58,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:31:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:31:58,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:31:58,686 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-04 09:31:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:59,117 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-04 09:31:59,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:31:59,117 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 09:31:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:59,118 INFO L225 Difference]: With dead ends: 132 [2018-10-04 09:31:59,118 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:31:59,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:31:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:31:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:31:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:31:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 09:31:59,124 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-04 09:31:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:59,125 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 09:31:59,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:31:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 09:31:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:31:59,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:59,125 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 09:31:59,125 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:59,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-04 09:31:59,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:59,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:59,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:59,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:59,846 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 [2018-10-04 09:31:59,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:59,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:31:59,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:59,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:59,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:59,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:31:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:31:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:31:59,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:31:59,952 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 09:32:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:00,072 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-04 09:32:00,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:32:00,075 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 09:32:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:00,075 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:32:00,075 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:32:00,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:32:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:32:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:32:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:32:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-04 09:32:00,082 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-04 09:32:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:00,082 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-04 09:32:00,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:32:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-04 09:32:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:32:00,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:00,083 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-04 09:32:00,083 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:00,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-04 09:32:00,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:00,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:00,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:00,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:00,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:01,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:01,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:01,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:01,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:01,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:01,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:32:01,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:32:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:32:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:32:01,258 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-04 09:32:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:03,437 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 09:32:03,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:32:03,438 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-04 09:32:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:03,438 INFO L225 Difference]: With dead ends: 134 [2018-10-04 09:32:03,438 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:32:03,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:32:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:32:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-04 09:32:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:32:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 09:32:03,444 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-04 09:32:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:03,445 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 09:32:03,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:32:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 09:32:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:32:03,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:03,445 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 09:32:03,445 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:03,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-04 09:32:03,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:03,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:03,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:03,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:03,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:04,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:04,107 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 [2018-10-04 09:32:04,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:32:04,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:32:04,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:04,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:04,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:04,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:32:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:32:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:32:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:04,219 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-04 09:32:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:04,583 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-04 09:32:04,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:32:04,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 09:32:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:04,584 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:32:04,584 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:32:04,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:32:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:32:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:32:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 09:32:04,590 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-04 09:32:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:04,590 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 09:32:04,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:32:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 09:32:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:32:04,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:04,590 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 09:32:04,591 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:04,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-04 09:32:04,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:04,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:04,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:04,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:04,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:05,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:05,353 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 [2018-10-04 09:32:05,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:32:05,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:32:05,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:05,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:05,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:05,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:32:05,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:32:05,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:32:05,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:05,461 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-04 09:32:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:05,585 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 09:32:05,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:32:05,586 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 09:32:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:05,586 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:32:05,586 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:32:05,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:32:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:32:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:32:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-04 09:32:05,592 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-04 09:32:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:05,592 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-04 09:32:05,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:32:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-04 09:32:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:32:05,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:05,593 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-04 09:32:05,593 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:05,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-04 09:32:05,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:05,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:05,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:05,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:05,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:06,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:06,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:06,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:32:06,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:32:06,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:06,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:06,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:06,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:32:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:32:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:32:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:06,681 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-04 09:32:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:08,873 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-04 09:32:08,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:32:08,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-04 09:32:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:08,874 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:32:08,874 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:32:08,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:32:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:32:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-04 09:32:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:32:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 09:32:08,881 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 09:32:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:08,881 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 09:32:08,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:32:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 09:32:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:32:08,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:08,882 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 09:32:08,882 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:08,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-04 09:32:08,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:08,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:08,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:09,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:09,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:09,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:32:09,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 09:32:09,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:09,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:09,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:09,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:32:09,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:32:09,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:32:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:09,845 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-04 09:32:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:10,405 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-04 09:32:10,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:32:10,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 09:32:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:10,407 INFO L225 Difference]: With dead ends: 138 [2018-10-04 09:32:10,407 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:32:10,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:32:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:32:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:32:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 09:32:10,413 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-04 09:32:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:10,413 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 09:32:10,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:32:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 09:32:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:32:10,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:10,414 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 09:32:10,414 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:10,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-04 09:32:10,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:10,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:10,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:10,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:10,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:11,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:11,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:11,164 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:32:11,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 09:32:11,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:11,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:11,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:11,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:32:11,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:32:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:32:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:11,271 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 09:32:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:11,407 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-04 09:32:11,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:32:11,407 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 09:32:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:11,408 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:32:11,408 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:32:11,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:32:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:32:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:32:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-04 09:32:11,413 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-04 09:32:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:11,414 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-04 09:32:11,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:32:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-04 09:32:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:32:11,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:11,414 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-04 09:32:11,414 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:11,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-04 09:32:11,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:11,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:11,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:11,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:11,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:12,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:12,433 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 [2018-10-04 09:32:12,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:12,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:12,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:12,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:32:12,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:32:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:32:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:12,539 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-04 09:32:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:14,848 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 09:32:14,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:32:14,849 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-04 09:32:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:14,849 INFO L225 Difference]: With dead ends: 140 [2018-10-04 09:32:14,850 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 09:32:14,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:32:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 09:32:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-04 09:32:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:32:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 09:32:14,856 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-04 09:32:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:14,856 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 09:32:14,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:32:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 09:32:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:32:14,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:14,857 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 09:32:14,857 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:14,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-04 09:32:14,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:14,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:14,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:14,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:14,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:15,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:15,580 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 [2018-10-04 09:32:15,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:32:15,640 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:32:15,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:15,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:15,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:15,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:32:15,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:32:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:32:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:15,680 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-04 09:32:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:16,270 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-04 09:32:16,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:32:16,270 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 09:32:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:16,271 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:32:16,271 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:32:16,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:32:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:32:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:32:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 09:32:16,277 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-04 09:32:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:16,277 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 09:32:16,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:32:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 09:32:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:32:16,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:16,278 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 09:32:16,278 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:16,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-04 09:32:16,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:16,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:16,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:16,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:16,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:17,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:17,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:17,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:32:17,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 09:32:17,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:17,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:17,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:17,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:32:17,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:32:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:32:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:17,177 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-04 09:32:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:17,303 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 09:32:17,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:32:17,303 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 09:32:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:17,304 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:32:17,304 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:32:17,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:32:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:32:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:32:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-04 09:32:17,311 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-04 09:32:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:17,312 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-04 09:32:17,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:32:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-04 09:32:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:32:17,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:17,312 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-04 09:32:17,313 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:17,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-04 09:32:17,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:17,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:17,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:17,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:17,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:18,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:18,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:18,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:32:18,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:32:18,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:18,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:18,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:18,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:32:18,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:32:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:32:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:18,586 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-04 09:32:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:20,988 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-04 09:32:20,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:32:20,988 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-04 09:32:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:20,989 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:32:20,989 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:32:20,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:32:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:32:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-04 09:32:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:32:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 09:32:20,997 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-04 09:32:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 09:32:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:32:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 09:32:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:32:20,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:20,998 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 09:32:20,998 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:20,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-04 09:32:20,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:20,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:20,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:20,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:20,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:21,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:21,816 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 [2018-10-04 09:32:21,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:32:21,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:32:21,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:21,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:21,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:21,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:32:21,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:32:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:32:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:21,932 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-04 09:32:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:22,318 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-04 09:32:22,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:32:22,318 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 09:32:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:22,319 INFO L225 Difference]: With dead ends: 144 [2018-10-04 09:32:22,319 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:32:22,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:32:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:32:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:32:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 09:32:22,325 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-04 09:32:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:22,326 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 09:32:22,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:32:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 09:32:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:32:22,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:22,326 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 09:32:22,326 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:22,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-04 09:32:22,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:22,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:22,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:23,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:23,155 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 [2018-10-04 09:32:23,164 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:32:23,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 09:32:23,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:23,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:23,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:23,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:32:23,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:32:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:32:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:23,271 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 09:32:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:23,402 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-04 09:32:23,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:32:23,402 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 09:32:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:23,403 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:32:23,403 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:32:23,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:32:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:32:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:32:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-04 09:32:23,409 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-04 09:32:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:23,410 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-04 09:32:23,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:32:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-04 09:32:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:32:23,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:23,410 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-04 09:32:23,410 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:23,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-04 09:32:23,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:23,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:23,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:24,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:24,493 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 [2018-10-04 09:32:24,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:24,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:24,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:24,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:32:24,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:32:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:32:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:24,601 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-04 09:32:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:27,118 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 09:32:27,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:32:27,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-04 09:32:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:27,119 INFO L225 Difference]: With dead ends: 146 [2018-10-04 09:32:27,119 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 09:32:27,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:32:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 09:32:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-04 09:32:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:32:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-04 09:32:27,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-04 09:32:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:27,126 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-04 09:32:27,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:32:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-04 09:32:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:32:27,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:27,127 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 09:32:27,127 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:27,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-04 09:32:27,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:27,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:27,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:27,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:27,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:27,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:27,912 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 [2018-10-04 09:32:27,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:32:27,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:32:27,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:27,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:28,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:32:28,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:32:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:32:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:28,033 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-04 09:32:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:28,679 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-04 09:32:28,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:32:28,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 09:32:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:28,680 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:32:28,681 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:32:28,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:32:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:32:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:32:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 09:32:28,687 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-04 09:32:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:28,687 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 09:32:28,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:32:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 09:32:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:32:28,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:28,688 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 09:32:28,688 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:28,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-04 09:32:28,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:28,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:28,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:28,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:28,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:29,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:29,515 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 [2018-10-04 09:32:29,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:32:29,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:32:29,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:29,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:29,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:29,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:32:29,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:32:29,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:32:29,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:29,635 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-04 09:32:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:29,805 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 09:32:29,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:32:29,805 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 09:32:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:29,806 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:32:29,806 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:32:29,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:32:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:32:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:32:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-04 09:32:29,813 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-04 09:32:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:29,813 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-04 09:32:29,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:32:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-04 09:32:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:32:29,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:29,813 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-04 09:32:29,813 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:29,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-04 09:32:29,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:29,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:29,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:29,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:29,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:30,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:30,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:32:31,012 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:32:31,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:31,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:31,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:31,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:32:31,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:32:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:32:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:31,064 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-04 09:32:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:33,672 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-04 09:32:33,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:32:33,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-04 09:32:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:33,673 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:32:33,673 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:32:33,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:32:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:32:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-04 09:32:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:32:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 09:32:33,679 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-04 09:32:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:33,679 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 09:32:33,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:32:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 09:32:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:32:33,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:33,679 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 09:32:33,679 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:33,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-04 09:32:33,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:33,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:33,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:33,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:33,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:34,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:34,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:34,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:32:34,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:32:34,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:34,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:34,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:34,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:32:34,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:32:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:32:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:34,635 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-04 09:32:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:35,321 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-04 09:32:35,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:32:35,322 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 09:32:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:35,322 INFO L225 Difference]: With dead ends: 150 [2018-10-04 09:32:35,322 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:32:35,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:32:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:32:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:32:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 09:32:35,331 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-04 09:32:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:35,331 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 09:32:35,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:32:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 09:32:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:32:35,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:35,332 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 09:32:35,332 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:35,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-04 09:32:35,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:35,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:35,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:35,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:35,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:36,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:36,206 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 [2018-10-04 09:32:36,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:32:36,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:32:36,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:36,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:36,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:36,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:32:36,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:32:36,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:32:36,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:36,324 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 09:32:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:36,492 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-04 09:32:36,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:32:36,493 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 09:32:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:36,493 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:32:36,493 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:32:36,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:32:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:32:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:32:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-04 09:32:36,500 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-04 09:32:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:36,500 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-04 09:32:36,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:32:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-04 09:32:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:32:36,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:36,501 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-04 09:32:36,501 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:36,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-04 09:32:36,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:36,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:36,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:36,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:36,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:37,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:37,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:37,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:37,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:37,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:37,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:32:37,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:32:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:32:37,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:37,774 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-04 09:32:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:40,501 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 09:32:40,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:32:40,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-04 09:32:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:40,503 INFO L225 Difference]: With dead ends: 152 [2018-10-04 09:32:40,503 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:32:40,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:32:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:32:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-04 09:32:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:32:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-04 09:32:40,509 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-04 09:32:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:40,509 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-04 09:32:40,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:32:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-04 09:32:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:32:40,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:40,510 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 09:32:40,510 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:40,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:40,510 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-04 09:32:40,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:40,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:40,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:40,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:40,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:41,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:41,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:41,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:32:41,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:32:41,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:41,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:41,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:41,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:32:41,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:32:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:32:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:41,469 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-04 09:32:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:42,164 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-04 09:32:42,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:32:42,165 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 09:32:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:42,165 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:32:42,165 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:32:42,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:32:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:32:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:32:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 09:32:42,174 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-04 09:32:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:42,174 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 09:32:42,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:32:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 09:32:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:32:42,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:42,175 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 09:32:42,175 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:42,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:42,175 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-04 09:32:42,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:42,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:42,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:42,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:42,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:43,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:43,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:43,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:32:43,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 09:32:43,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:43,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:43,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:43,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:32:43,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:32:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:32:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:43,222 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-04 09:32:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:43,384 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 09:32:43,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:32:43,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 09:32:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:43,385 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:32:43,385 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:32:43,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:32:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:32:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:32:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-04 09:32:43,392 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-04 09:32:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:43,393 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-04 09:32:43,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:32:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-04 09:32:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:32:43,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:43,393 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-04 09:32:43,393 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:43,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-04 09:32:43,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:43,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:43,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:43,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:43,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:44,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:44,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:44,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:32:44,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:32:44,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:44,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:44,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:44,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:32:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:32:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:32:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:44,757 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-04 09:32:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:47,597 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-04 09:32:47,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:32:47,597 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-04 09:32:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:47,598 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:32:47,598 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:32:47,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:32:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:32:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-04 09:32:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:32:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 09:32:47,604 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 09:32:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:47,604 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 09:32:47,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:32:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 09:32:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:32:47,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:47,605 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 09:32:47,605 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:47,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-04 09:32:47,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:47,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:47,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:47,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:47,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:48,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:48,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:48,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:32:48,641 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 09:32:48,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:48,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:48,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:48,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:32:48,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:32:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:32:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:48,684 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-04 09:32:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:49,410 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-04 09:32:49,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:32:49,411 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 09:32:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:49,411 INFO L225 Difference]: With dead ends: 156 [2018-10-04 09:32:49,411 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:32:49,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:32:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:32:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:32:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 09:32:49,418 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-04 09:32:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 09:32:49,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:32:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 09:32:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:32:49,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:49,419 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 09:32:49,419 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:49,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-04 09:32:49,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:49,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:49,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:49,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:49,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:50,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:50,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:50,371 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:32:50,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 09:32:50,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:50,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:50,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:50,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:32:50,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:32:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:32:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:50,488 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 09:32:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:50,645 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-04 09:32:50,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:32:50,646 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 09:32:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:50,647 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:32:50,647 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:32:50,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:32:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:32:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:32:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-04 09:32:50,653 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-04 09:32:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:50,654 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-04 09:32:50,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:32:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-04 09:32:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:32:50,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:50,654 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-04 09:32:50,654 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:50,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-04 09:32:50,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:50,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:50,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:50,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:50,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:51,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:51,902 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 [2018-10-04 09:32:51,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:51,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:52,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:52,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:32:52,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:32:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:32:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:52,022 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-04 09:32:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:54,988 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 09:32:54,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:32:54,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-04 09:32:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:54,989 INFO L225 Difference]: With dead ends: 158 [2018-10-04 09:32:54,989 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 09:32:54,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:32:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 09:32:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-04 09:32:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:32:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 09:32:54,995 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-04 09:32:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:54,995 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 09:32:54,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:32:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 09:32:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:32:54,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:54,996 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 09:32:54,996 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:54,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-04 09:32:54,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:54,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:54,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:54,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:32:54,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:55,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:55,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:32:55,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:32:56,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:32:56,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:56,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:56,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:56,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:32:56,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:32:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:32:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:32:56,056 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-04 09:32:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:56,522 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-04 09:32:56,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:32:56,522 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 09:32:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:56,523 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:32:56,523 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:32:56,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:32:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:32:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:32:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:32:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 09:32:56,530 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-04 09:32:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:56,531 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 09:32:56,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:32:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 09:32:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:32:56,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:56,531 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 09:32:56,531 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:56,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-04 09:32:56,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:56,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:56,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:57,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:57,524 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 [2018-10-04 09:32:57,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:32:57,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-04 09:32:57,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:57,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:57,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:57,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:32:57,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:32:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:32:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:32:57,648 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-04 09:32:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:32:57,797 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 09:32:57,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:32:57,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 09:32:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:32:57,798 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:32:57,798 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:32:57,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:32:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:32:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:32:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:32:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-04 09:32:57,805 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-04 09:32:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:32:57,805 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-04 09:32:57,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:32:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-04 09:32:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:32:57,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:32:57,806 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-04 09:32:57,806 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:32:57,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:32:57,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-04 09:32:57,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:32:57,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:32:57,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:57,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:32:57,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:32:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:32:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:59,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:32:59,143 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 [2018-10-04 09:32:59,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:32:59,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:32:59,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:32:59,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:32:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:32:59,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:32:59,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:32:59,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:32:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:32:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:32:59,264 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-04 09:33:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:02,372 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-04 09:33:02,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:33:02,372 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-04 09:33:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:02,373 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:33:02,373 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:33:02,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:33:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:33:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-04 09:33:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:33:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 09:33:02,380 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-04 09:33:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:02,380 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 09:33:02,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:33:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 09:33:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:33:02,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:02,380 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 09:33:02,380 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:02,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-04 09:33:02,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:02,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:02,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:02,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:02,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:03,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:03,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:03,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:33:03,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-04 09:33:03,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:03,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:03,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:03,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:33:03,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:33:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:33:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:03,463 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-04 09:33:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:04,303 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-04 09:33:04,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:33:04,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 09:33:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:04,304 INFO L225 Difference]: With dead ends: 162 [2018-10-04 09:33:04,304 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:33:04,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:33:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:33:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:33:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 09:33:04,314 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-04 09:33:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:04,314 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 09:33:04,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:33:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 09:33:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:33:04,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:04,315 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 09:33:04,315 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:04,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:04,315 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-04 09:33:04,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:04,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:04,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:04,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:04,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:05,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:05,372 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 [2018-10-04 09:33:05,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:33:05,462 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 09:33:05,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:05,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:05,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:05,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:33:05,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:33:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:33:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:05,506 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 09:33:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:05,709 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-04 09:33:05,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:33:05,709 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 09:33:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:05,710 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:33:05,710 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:33:05,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:33:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:33:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:33:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-04 09:33:05,717 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-04 09:33:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:05,717 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-04 09:33:05,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:33:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-04 09:33:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:33:05,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:05,718 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-04 09:33:05,718 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:05,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-04 09:33:05,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:05,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:05,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:05,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:05,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:07,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:07,066 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 [2018-10-04 09:33:07,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:07,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:07,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:07,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:33:07,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:33:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:33:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:07,202 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-04 09:33:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:10,440 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 09:33:10,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:33:10,441 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-04 09:33:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:10,441 INFO L225 Difference]: With dead ends: 164 [2018-10-04 09:33:10,441 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:33:10,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:33:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:33:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-04 09:33:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:33:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 09:33:10,449 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 09:33:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:10,449 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 09:33:10,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:33:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 09:33:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:33:10,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:10,449 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 09:33:10,449 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:10,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-04 09:33:10,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:10,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:10,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:11,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:11,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:11,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:33:11,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:33:11,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:11,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:11,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:11,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:33:11,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:33:11,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:33:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:11,558 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-04 09:33:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:12,172 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-04 09:33:12,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:33:12,173 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 09:33:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:12,173 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:33:12,174 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:33:12,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:33:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:33:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:33:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 09:33:12,183 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-04 09:33:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:12,184 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 09:33:12,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:33:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 09:33:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:33:12,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:12,184 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 09:33:12,185 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:12,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-04 09:33:12,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:12,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:12,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:12,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:13,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:13,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:13,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:33:13,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:33:13,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:13,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:13,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:13,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:33:13,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:33:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:33:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:13,386 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-04 09:33:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:13,569 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 09:33:13,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:33:13,570 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 09:33:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:13,570 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:33:13,570 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:33:13,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:33:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:33:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:33:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-04 09:33:13,578 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-04 09:33:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:13,578 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-04 09:33:13,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:33:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-04 09:33:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:33:13,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:13,578 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-04 09:33:13,578 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:13,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:13,579 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-04 09:33:13,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:13,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:13,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:13,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:13,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:14,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:14,977 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 [2018-10-04 09:33:14,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:33:15,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:33:15,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:15,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:15,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:15,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:33:15,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:33:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:33:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:15,100 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-04 09:33:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:18,425 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-04 09:33:18,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:33:18,426 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-04 09:33:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:18,426 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:33:18,426 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:33:18,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:33:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:33:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-04 09:33:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:33:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 09:33:18,434 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-04 09:33:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:18,434 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 09:33:18,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:33:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 09:33:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:33:18,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:18,435 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 09:33:18,435 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:18,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-04 09:33:18,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:18,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:18,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:19,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:19,457 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 [2018-10-04 09:33:19,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:33:19,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:33:19,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:19,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:19,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:19,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:33:19,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:33:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:33:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:19,604 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-04 09:33:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:20,464 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-04 09:33:20,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:33:20,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 09:33:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:20,465 INFO L225 Difference]: With dead ends: 168 [2018-10-04 09:33:20,465 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:33:20,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:33:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:33:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:33:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 09:33:20,473 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-04 09:33:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:20,473 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 09:33:20,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:33:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 09:33:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:33:20,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:20,474 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 09:33:20,474 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:20,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-04 09:33:20,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:20,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:20,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:20,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:20,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:22,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:22,167 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 [2018-10-04 09:33:22,174 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:33:22,255 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:33:22,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:22,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:22,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:22,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:33:22,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:33:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:33:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:22,298 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 09:33:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:22,476 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-04 09:33:22,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:33:22,477 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 09:33:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:22,477 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:33:22,477 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:33:22,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:33:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:33:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:33:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-04 09:33:22,485 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-04 09:33:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:22,485 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-04 09:33:22,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:33:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-04 09:33:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:33:22,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:22,486 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-04 09:33:22,486 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:22,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-04 09:33:22,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:22,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:22,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:22,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:22,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:23,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:23,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:23,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:24,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:24,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:24,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:33:24,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:33:24,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:33:24,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:24,070 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-04 09:33:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:27,519 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 09:33:27,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:33:27,519 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-04 09:33:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:27,520 INFO L225 Difference]: With dead ends: 170 [2018-10-04 09:33:27,520 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 09:33:27,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:33:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 09:33:27,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-04 09:33:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:33:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-04 09:33:27,528 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-04 09:33:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:27,528 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-04 09:33:27,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:33:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-04 09:33:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:33:27,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:27,529 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 09:33:27,529 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:27,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-04 09:33:27,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:27,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:27,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:27,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:27,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:28,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:28,589 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 [2018-10-04 09:33:28,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:33:28,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:33:28,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:28,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:28,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:28,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:33:28,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:33:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:33:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:28,705 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-04 09:33:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:29,226 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-04 09:33:29,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:33:29,226 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 09:33:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:29,227 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:33:29,227 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:33:29,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:33:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:33:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:33:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 09:33:29,235 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-04 09:33:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:29,235 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 09:33:29,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:33:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 09:33:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:33:29,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:29,236 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 09:33:29,236 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:29,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-04 09:33:29,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:29,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:29,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:29,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:29,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:30,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:30,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:30,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:33:30,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:33:30,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:30,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:30,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:30,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:33:30,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:33:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:33:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:30,523 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-04 09:33:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:30,688 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 09:33:30,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:33:30,688 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 09:33:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:30,689 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:33:30,689 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:33:30,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:33:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:33:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:33:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-04 09:33:30,698 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-04 09:33:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:30,699 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-04 09:33:30,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:33:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-04 09:33:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:33:30,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:30,699 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-04 09:33:30,700 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:30,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-04 09:33:30,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:30,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:30,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:30,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:30,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:32,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:32,232 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 [2018-10-04 09:33:32,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:33:32,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:33:32,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:32,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:32,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:32,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:33:32,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:33:32,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:33:32,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:32,360 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-04 09:33:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:35,932 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-04 09:33:35,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:33:35,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-04 09:33:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:35,933 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:33:35,933 INFO L226 Difference]: Without dead ends: 170 [2018-10-04 09:33:35,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:33:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-04 09:33:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-04 09:33:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:33:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 09:33:35,941 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-04 09:33:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:35,941 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 09:33:35,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:33:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 09:33:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:33:35,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:35,942 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 09:33:35,942 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:35,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-04 09:33:35,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:35,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:35,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:35,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:35,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:37,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:37,045 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 [2018-10-04 09:33:37,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:33:37,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-04 09:33:37,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:37,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:37,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:37,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:33:37,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:33:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:33:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:37,203 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-04 09:33:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:37,582 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-04 09:33:37,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:33:37,582 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 09:33:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:37,583 INFO L225 Difference]: With dead ends: 174 [2018-10-04 09:33:37,583 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:33:37,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:33:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:33:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:33:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 09:33:37,595 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-04 09:33:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:37,595 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 09:33:37,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:33:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 09:33:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:33:37,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:37,595 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 09:33:37,596 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:37,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-04 09:33:37,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:37,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:37,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:37,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:37,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:38,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:38,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:38,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:33:38,878 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 09:33:38,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:38,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:38,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:38,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:33:38,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:33:38,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:33:38,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:38,923 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 09:33:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:39,107 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-04 09:33:39,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:33:39,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 09:33:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:39,108 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:33:39,108 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:33:39,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:33:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:33:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:33:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-04 09:33:39,115 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-04 09:33:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-04 09:33:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:33:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-04 09:33:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 09:33:39,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:39,116 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-04 09:33:39,116 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:39,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:39,116 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-04 09:33:39,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:39,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:39,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:39,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:39,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:40,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:40,648 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 [2018-10-04 09:33:40,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:40,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:40,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:40,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:33:40,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:33:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:33:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:40,777 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-04 09:33:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:44,482 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 09:33:44,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:33:44,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-04 09:33:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:44,483 INFO L225 Difference]: With dead ends: 176 [2018-10-04 09:33:44,483 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:33:44,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:33:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:33:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-04 09:33:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:33:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 09:33:44,491 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-04 09:33:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:44,491 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 09:33:44,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:33:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 09:33:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:33:44,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:44,492 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 09:33:44,492 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:44,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-04 09:33:44,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:44,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:44,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:44,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:33:44,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:45,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:45,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:33:45,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:33:45,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:33:45,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:45,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:45,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:45,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:33:45,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:33:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:33:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:45,757 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-04 09:33:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:46,318 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-04 09:33:46,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:33:46,319 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 09:33:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:46,319 INFO L225 Difference]: With dead ends: 177 [2018-10-04 09:33:46,319 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 09:33:46,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 09:33:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 09:33:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 09:33:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 09:33:46,330 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-04 09:33:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:46,330 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 09:33:46,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:33:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 09:33:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:33:46,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:46,331 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-04 09:33:46,331 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:46,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:46,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-04 09:33:46,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:46,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:46,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:46,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:46,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:47,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:47,563 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 [2018-10-04 09:33:47,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:33:47,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 09:33:47,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:47,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:47,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:47,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:33:47,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:33:47,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:33:47,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:47,707 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-04 09:33:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:47,893 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 09:33:47,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:33:47,894 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 09:33:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:47,894 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:33:47,895 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:33:47,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:33:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:33:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:33:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-04 09:33:47,902 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-04 09:33:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:47,902 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-04 09:33:47,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:33:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-04 09:33:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:33:47,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:47,903 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-04 09:33:47,903 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:47,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-04 09:33:47,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:47,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:47,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:47,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:47,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:49,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:49,533 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 [2018-10-04 09:33:49,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:33:49,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:33:49,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:49,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:49,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:49,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:33:49,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:33:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:33:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:49,664 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-10-04 09:33:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:33:53,516 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-10-04 09:33:53,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:33:53,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-10-04 09:33:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:33:53,517 INFO L225 Difference]: With dead ends: 179 [2018-10-04 09:33:53,517 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 09:33:53,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:33:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 09:33:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-10-04 09:33:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:33:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-04 09:33:53,524 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-10-04 09:33:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:33:53,524 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-04 09:33:53,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:33:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-04 09:33:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:33:53,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:33:53,525 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-04 09:33:53,525 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:33:53,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:33:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-10-04 09:33:53,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:33:53,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:33:53,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:53,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:33:53,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:33:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:33:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:54,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:33:54,693 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 [2018-10-04 09:33:54,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:33:54,808 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:33:54,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:33:54,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:33:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:33:54,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:33:54,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:33:54,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:33:54,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:33:54,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:33:54,873 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. Received shutdown request... [2018-10-04 09:33:55,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:33:55,117 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:33:55,123 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:33:55,123 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:33:55 BoogieIcfgContainer [2018-10-04 09:33:55,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:33:55,124 INFO L168 Benchmark]: Toolchain (without parser) took 233941.97 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -211.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 257.0 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:33:55,126 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:33:55,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.80 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. [2018-10-04 09:33:55,126 INFO L168 Benchmark]: Boogie Preprocessor took 26.26 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. [2018-10-04 09:33:55,126 INFO L168 Benchmark]: RCFGBuilder took 227.44 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. [2018-10-04 09:33:55,127 INFO L168 Benchmark]: TraceAbstraction took 233639.14 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -211.3 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 235.9 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2018-10-04 09:33:55,131 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.80 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 26.26 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 227.44 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 233639.14 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -211.3 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 235.9 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 59 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (70 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 59 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (70 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 233.5s OverallTime, 170 OverallIterations, 57 TraceHistogramMax, 108.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 682 SDtfs, 1559 SDslu, 6277 SDs, 0 SdLazy, 161338 SolverSat, 1939 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20101 GetRequests, 14975 SyntacticMatches, 112 SemanticMatches, 5014 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 101.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, 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: 0.8s AutomataMinimizationTime, 169 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 107.2s InterpolantComputationTime, 20835 NumberOfCodeBlocks, 20835 NumberOfCodeBlocksAsserted, 1610 NumberOfCheckSat, 20498 ConstructedInterpolants, 0 QuantifiedInterpolants, 6901950 SizeOfPredicates, 111 NumberOfNonLiveVariables, 45092 ConjunctsInSsa, 13157 ConjunctsInUnsatCore, 337 InterpolantComputations, 3 PerfectInterpolantSequences, 126727/370383 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-33-55-139.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-33-55-139.csv Completed graceful shutdown