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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:46:44,615 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:46:44,617 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:46:44,635 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:46:44,635 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:46:44,637 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:46:44,639 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:46:44,641 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:46:44,643 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:46:44,644 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:46:44,645 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:46:44,672 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:46:44,687 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:46:44,687 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:46:44,688 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:46:44,688 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:46:44,689 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:46:44,689 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:46:44,690 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:46:44,690 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:46:44,690 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:46:44,690 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:46:44,690 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:46:44,691 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:46:44,691 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:46:44,691 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:46:44,691 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:46:44,692 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:46:44,692 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:46:44,692 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:46:44,692 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:46:44,692 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:46:44,693 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:46:44,693 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:46:44,693 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:46:44,693 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:46:44,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:46:44,694 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:46:44,694 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:46:44,694 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:46:44,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:46:44,695 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:46:44,695 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:46:44,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:46:44,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:46:44,769 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:46:44,770 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:46:44,771 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:46:44,772 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-10-04 12:46:44,772 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-10-04 12:46:44,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:46:44,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:46:44,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:44,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:46:44,841 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:46:44,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:46:44,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:46:44,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:46:44,888 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:46:44,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/1) ... [2018-10-04 12:46:44,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:46:44,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:46:44,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:46:44,914 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:46:44,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (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 12:46:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:46:44,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:46:45,266 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:46:45,267 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45 BoogieIcfgContainer [2018-10-04 12:46:45,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:46:45,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:46:45,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:46:45,273 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:46:45,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:46:44" (1/2) ... [2018-10-04 12:46:45,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d41d83 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:46:45, skipping insertion in model container [2018-10-04 12:46:45,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:46:45" (2/2) ... [2018-10-04 12:46:45,278 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-10-04 12:46:45,288 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:46:45,298 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:46:45,343 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:46:45,344 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:46:45,344 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:46:45,344 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:46:45,344 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:46:45,345 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:46:45,345 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:46:45,345 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:46:45,345 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:46:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:46:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:46:45,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,368 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:46:45,370 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,377 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:46:45,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,535 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 12:46:45,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:46:45,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:46:45,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:46:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:46:45,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:45,560 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:46:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:45,620 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:46:45,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:46:45,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:46:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:45,635 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:46:45,636 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:46:45,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:46:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:46:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:46:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:46:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:46:45,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:46:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:45,680 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:46:45,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:46:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:46:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:46:45,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:45,681 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:46:45,681 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:45,682 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 12:46:45,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:45,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:45,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,879 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 12:46:45,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:45,880 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 12:46:45,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:45,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,061 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 12:46:46,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:46:46,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:46:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:46:46,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,100 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 12:46:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,198 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:46:46,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:46:46,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:46:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,201 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:46:46,201 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:46:46,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 2 [2018-10-04 12:46:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:46:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:46:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:46:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:46:46,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:46:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,207 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:46:46,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:46:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:46:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:46:46,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,209 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:46:46,209 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,209 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 12:46:46,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:46,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,437 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 12:46:46,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,438 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 12:46:46,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:46,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:46,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:46,531 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 12:46:46,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:46,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:46:46,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:46:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:46:46,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:46,553 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 12:46:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:46,595 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:46:46,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:46:46,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:46:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:46,597 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:46:46,597 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:46:46,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 3 [2018-10-04 12:46:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:46:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:46:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:46:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:46:46,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:46:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:46,604 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:46:46,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:46:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:46:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:46:46,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:46,607 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:46:46,607 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:46,607 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 12:46:46,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:46,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:46,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:46,790 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 12:46:46,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:46,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:46,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:46,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:46:46,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:46,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,053 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 12:46:47,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:46:47,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:46:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:46:47,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,087 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 12:46:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,124 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:46:47,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:46:47,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:46:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,126 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:46:47,126 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:46:47,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 4 [2018-10-04 12:46:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:46:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:46:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:46:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:46:47,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:46:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,131 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:46:47,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:46:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:46:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:46:47,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,133 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:46:47,133 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,133 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 12:46:47,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,282 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 12:46:47,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,282 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 12:46:47,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:47,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:47,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,439 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 12:46:47,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:46:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:46:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:46:47,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,461 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 12:46:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,497 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:46:47,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:46:47,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:46:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,498 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:46:47,499 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:46:47,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 5 [2018-10-04 12:46:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:46:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:46:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:46:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:46:47,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:46:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,504 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:46:47,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:46:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:46:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:46:47,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,505 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:46:47,505 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,506 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 12:46:47,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:47,726 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 12:46:47,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:47,726 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 12:46:47,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:47,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:46:47,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:47,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:47,824 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 12:46:47,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:47,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:46:47,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:46:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:46:47,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:47,847 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 12:46:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:47,899 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:46:47,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:46:47,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:46:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:47,901 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:46:47,901 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:46:47,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:46:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:46:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:46:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:46:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:46:47,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:46:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:47,906 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:46:47,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:46:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:46:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:46:47,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:47,907 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:46:47,907 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:47,908 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 12:46:47,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:47,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:47,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:47,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:48,049 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 12:46:48,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:48,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:48,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:48,120 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:46:48,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:48,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:48,569 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 12:46:48,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:48,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:46:48,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:46:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:46:48,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:48,592 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 12:46:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:48,652 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:46:48,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:46:48,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:46:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:48,654 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:46:48,654 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:46:48,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.0s impTime 7 [2018-10-04 12:46:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:46:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:46:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:46:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:46:48,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:46:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:48,659 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:46:48,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:46:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:46:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:46:48,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:48,660 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:46:48,661 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:48,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 12:46:48,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:48,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:48,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,042 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 12:46:49,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,042 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 12:46:49,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,154 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 12:46:49,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:46:49,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:46:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:46:49,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,180 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 12:46:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,211 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:46:49,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:46:49,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:46:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,213 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:46:49,213 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:46:49,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 12:46:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:46:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:46:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:46:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:46:49,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:46:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,219 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:46:49,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:46:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:46:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:46:49,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,220 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:46:49,220 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,220 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 12:46:49,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:49,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,412 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 12:46:49,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:49,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:49,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:49,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:49,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,544 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 12:46:49,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:46:49,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:46:49,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:46:49,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,566 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 12:46:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,617 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:46:49,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:46:49,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:46:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,622 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:46:49,623 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:46:49,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 12:46:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:46:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:46:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:46:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:46:49,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:46:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:49,628 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:46:49,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:46:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:46:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:46:49,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:49,629 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:46:49,630 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:49,630 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 12:46:49,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:49,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:49,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:49,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:49,804 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 12:46:49,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:49,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:49,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:49,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:46:49,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:49,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:49,933 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 12:46:49,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:49,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:46:49,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:46:49,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:46:49,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:49,955 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 12:46:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:49,994 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:46:49,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:46:49,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:46:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:49,996 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:46:49,997 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:46:49,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 10 [2018-10-04 12:46:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:46:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:46:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:46:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:46:50,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:46:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,002 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:46:50,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:46:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:46:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:46:50,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,003 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 12:46:50,003 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,003 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 12:46:50,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:50,165 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 12:46:50,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:50,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:50,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:50,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:50,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:50,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:50,278 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 12:46:50,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:50,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:46:50,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:46:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:46:50,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:50,303 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 12:46:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,354 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:46:50,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:46:50,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:46:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,356 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:46:50,356 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:46:50,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 11 [2018-10-04 12:46:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:46:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:46:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:46:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:46:50,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:46:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,363 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:46:50,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:46:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:46:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:46:50,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,364 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 12:46:50,364 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,364 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 12:46:50,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:50,511 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 12:46:50,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:50,511 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 12:46:50,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:50,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:46:50,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:50,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:50,630 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 12:46:50,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:50,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:46:50,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:46:50,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:46:50,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:50,662 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 12:46:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:50,761 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:46:50,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:46:50,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:46:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:50,762 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:46:50,762 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:46:50,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 12 [2018-10-04 12:46:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:46:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:46:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:46:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:46:50,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:46:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:50,772 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:46:50,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:46:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:46:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:46:50,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:50,774 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 12:46:50,774 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:50,774 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 12:46:50,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:50,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:50,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:50,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,069 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 12:46:51,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:51,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:51,248 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:46:51,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:51,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:51,733 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 12:46:51,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:51,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:46:51,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:46:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:46:51,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:51,755 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 12:46:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:51,793 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:46:51,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:46:51,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:46:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:51,796 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:46:51,796 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:46:51,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 13 [2018-10-04 12:46:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:46:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:46:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:46:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:46:51,801 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:46:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:51,802 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:46:51,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:46:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:46:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:46:51,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:51,803 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 12:46:51,803 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:51,803 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:51,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 12:46:51,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:51,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:51,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:51,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:51,980 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 12:46:51,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:51,981 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 12:46:51,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:52,216 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 12:46:52,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:52,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:46:52,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:46:52,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:46:52,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:52,238 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 12:46:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:52,309 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:46:52,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:46:52,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:46:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:52,312 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:46:52,312 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:46:52,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 12:46:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:46:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:46:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:46:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:46:52,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:46:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:52,318 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:46:52,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:46:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:46:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:46:52,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:52,319 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 12:46:52,320 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:52,320 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 12:46:52,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:52,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:52,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:52,549 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 12:46:52,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:52,550 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 12:46:52,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:52,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:52,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:52,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:52,761 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 12:46:52,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:52,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:46:52,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:46:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:46:52,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:52,786 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 12:46:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:52,858 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:46:52,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:46:52,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:46:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:52,859 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:46:52,859 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:46:52,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 12:46:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:46:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:46:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:46:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:46:52,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:46:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:52,865 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:46:52,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:46:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:46:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:46:52,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:52,866 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 12:46:52,866 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:52,866 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 12:46:52,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:52,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:52,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:53,156 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 12:46:53,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:53,157 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 12:46:53,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:53,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:46:53,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:53,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:53,552 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 12:46:53,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:53,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:46:53,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:46:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:46:53,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:53,574 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 12:46:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:53,639 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:46:53,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:46:53,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:46:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:53,641 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:46:53,642 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:46:53,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 16 [2018-10-04 12:46:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:46:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:46:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:46:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:46:53,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 12:46:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:53,646 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:46:53,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:46:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:46:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:46:53,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:53,647 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 12:46:53,648 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:53,648 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 12:46:53,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:53,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:53,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:53,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:53,896 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 12:46:53,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:53,897 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 12:46:53,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:53,937 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:53,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:53,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:54,267 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 12:46:54,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:54,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:46:54,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:46:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:46:54,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:54,288 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 12:46:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:54,348 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:46:54,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:46:54,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:46:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:54,349 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:46:54,350 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:46:54,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 17 [2018-10-04 12:46:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:46:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:46:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:46:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:46:54,356 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 12:46:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:54,356 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:46:54,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:46:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:46:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:46:54,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:54,357 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 12:46:54,358 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:54,358 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 12:46:54,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:54,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:54,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:54,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:54,694 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 12:46:54,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:54,694 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 12:46:54,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:54,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:46:54,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:54,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:55,116 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 12:46:55,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:55,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:46:55,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:46:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:46:55,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:55,139 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 12:46:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:55,258 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:46:55,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:46:55,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:46:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:55,260 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:46:55,260 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:46:55,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 18 [2018-10-04 12:46:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:46:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:46:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:46:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:46:55,269 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 12:46:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:55,270 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:46:55,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:46:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:46:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:46:55,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:55,271 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 12:46:55,271 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:55,271 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 12:46:55,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:55,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:55,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:55,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:56,058 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:56,061 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 12:46:56,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:56,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:46:56,070 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:56,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:46:56,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:56,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:56,280 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 12:46:56,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:56,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:46:56,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:46:56,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:46:56,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:56,301 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-04 12:46:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:56,799 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:46:56,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:46:56,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:46:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:56,801 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:46:56,801 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:46:56,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 6 [2018-10-04 12:46:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:46:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:46:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:46:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:46:56,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 12:46:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:56,806 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:46:56,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:46:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:46:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:46:56,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:56,808 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-04 12:46:56,808 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:56,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-04 12:46:56,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:56,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:56,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:56,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:57,045 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:57,060 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 12:46:57,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:57,060 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 12:46:57,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:57,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:57,191 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 12:46:57,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:57,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:46:57,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:46:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:46:57,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:57,215 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-04 12:46:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:57,292 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:46:57,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:46:57,292 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:46:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:57,293 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:46:57,294 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:46:57,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 7 [2018-10-04 12:46:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:46:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:46:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:46:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:46:57,300 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 12:46:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:57,300 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:46:57,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:46:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:46:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:46:57,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:57,301 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-04 12:46:57,301 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:57,302 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:57,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-04 12:46:57,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:57,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:57,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:57,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:57,608 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:57,640 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 12:46:57,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:57,640 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 12:46:57,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:57,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:57,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:57,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:57,798 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 12:46:57,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:57,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:46:57,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:46:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:46:57,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:57,820 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-04 12:46:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:57,909 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:46:57,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:46:57,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:46:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:57,911 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:46:57,911 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:46:57,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 12:46:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:46:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:46:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:46:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:46:57,916 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 12:46:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:57,917 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:46:57,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:46:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:46:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:46:57,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:57,917 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-04 12:46:57,918 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:57,918 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-04 12:46:57,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:57,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:57,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:57,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:58,981 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:59,012 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 12:46:59,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:59,012 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 12:46:59,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:59,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:46:59,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:59,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:59,182 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 12:46:59,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:59,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:46:59,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:46:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:46:59,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:59,205 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-04 12:46:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:59,324 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:46:59,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:46:59,326 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:46:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:59,327 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:46:59,327 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:46:59,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 9 [2018-10-04 12:46:59,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:46:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:46:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:46:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:46:59,331 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 12:46:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:59,331 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:46:59,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:46:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:46:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:46:59,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:59,332 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-04 12:46:59,332 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:59,333 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-04 12:46:59,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:59,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:59,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:59,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:59,626 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:59,664 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 12:46:59,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:59,664 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 12:46:59,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:59,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:59,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:59,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:59,855 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 12:46:59,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:59,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:46:59,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:46:59,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:46:59,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:59,880 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-04 12:47:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:00,117 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:47:00,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:47:00,118 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:47:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:00,118 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:47:00,118 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:47:00,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 10 [2018-10-04 12:47:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:47:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:47:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:47:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:47:00,123 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 12:47:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:00,123 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:47:00,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:47:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:47:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:47:00,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:00,124 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-04 12:47:00,125 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:00,125 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-04 12:47:00,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:00,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:00,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:00,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:00,443 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:00,567 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 12:47:00,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:00,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:00,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:00,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:47:00,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:00,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:00,780 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 12:47:00,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:00,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:47:00,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:47:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:47:00,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:00,800 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-04 12:47:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:00,835 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:47:00,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:47:00,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:47:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:00,836 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:47:00,836 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:47:00,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 11 [2018-10-04 12:47:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:47:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:47:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:47:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:47:00,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 12:47:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:00,841 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:47:00,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:47:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:47:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:47:00,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:00,841 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-04 12:47:00,841 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:00,842 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-04 12:47:00,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:00,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:00,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:01,391 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:01,533 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 12:47:01,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:01,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:01,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:01,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:47:01,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:01,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:01,761 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 12:47:01,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:01,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:47:01,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:47:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:47:01,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:01,783 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-04 12:47:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:01,831 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:47:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:47:01,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:47:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:01,832 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:47:01,832 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:47:01,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 12 [2018-10-04 12:47:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:47:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:47:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:47:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:47:01,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 12:47:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:01,837 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:47:01,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:47:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:47:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:47:01,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:01,838 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-04 12:47:01,838 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:01,838 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-04 12:47:01,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:01,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:01,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:01,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:02,217 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:02,326 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 12:47:02,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:02,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:02,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:02,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:02,475 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 12:47:02,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:02,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:47:02,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:47:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:47:02,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:02,498 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-04 12:47:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:02,551 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:47:02,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:47:02,556 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:47:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:02,557 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:47:02,557 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:47:02,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 13 [2018-10-04 12:47:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:47:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:47:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:47:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:47:02,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 12:47:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:02,561 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:47:02,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:47:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:47:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:47:02,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:02,562 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-04 12:47:02,562 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:02,562 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-04 12:47:02,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:02,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:02,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:02,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,160 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:03,300 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 12:47:03,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:03,301 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 12:47:03,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:03,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:03,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:03,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:03,493 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 12:47:03,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:03,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:47:03,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:47:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:47:03,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:03,515 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-04 12:47:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:03,565 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:47:03,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:47:03,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:47:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:03,566 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:47:03,566 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:47:03,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 14 [2018-10-04 12:47:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:47:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:47:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:47:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:47:03,570 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 12:47:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:47:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:47:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:47:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:47:03,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:03,572 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-04 12:47:03,572 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:03,572 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-04 12:47:03,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:03,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:03,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:03,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:04,002 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 12:47:04,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:04,003 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 12:47:04,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:04,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:47:04,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:04,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:04,231 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 12:47:04,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:04,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:47:04,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:47:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:47:04,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:04,254 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-04 12:47:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:04,302 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:47:04,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:47:04,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:47:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:04,303 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:47:04,304 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:47:04,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 15 [2018-10-04 12:47:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:47:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:47:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:47:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:47:04,306 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 12:47:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:04,306 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:47:04,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:47:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:47:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:47:04,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:04,307 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-04 12:47:04,307 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:04,307 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-04 12:47:04,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:04,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:04,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:04,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:04,848 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:05,081 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 12:47:05,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:05,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:05,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:05,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:05,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:05,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:05,271 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 12:47:05,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:05,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:47:05,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:47:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:47:05,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:05,292 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-04 12:47:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:05,446 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:47:05,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:47:05,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:47:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:05,447 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:47:05,448 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:47:05,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 16 [2018-10-04 12:47:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:47:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:47:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:47:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:47:05,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 12:47:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:05,452 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:47:05,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:47:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:47:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:47:05,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:05,453 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-04 12:47:05,453 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:05,453 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-04 12:47:05,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:05,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:05,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:05,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:05,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:05,835 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 12:47:05,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:05,836 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 12:47:05,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:06,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:47:06,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:06,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:06,161 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 12:47:06,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:06,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:47:06,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:47:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:47:06,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:06,184 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-04 12:47:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:06,233 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:47:06,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:47:06,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:47:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:06,234 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:47:06,234 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:47:06,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:47:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:47:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:47:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:47:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:47:06,237 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 12:47:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:06,237 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:47:06,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:47:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:47:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:47:06,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:06,238 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-04 12:47:06,238 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:06,239 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-04 12:47:06,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:06,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:06,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:06,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:06,775 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:07,092 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 12:47:07,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:07,093 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 12:47:07,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:07,214 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:47:07,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:07,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:07,329 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 12:47:07,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:07,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:47:07,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:47:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:47:07,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:07,351 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-04 12:47:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:07,394 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:47:07,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:47:07,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:47:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:07,395 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:47:07,395 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:47:07,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 18 [2018-10-04 12:47:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:47:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:47:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:47:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:47:07,399 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 12:47:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:07,399 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:47:07,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:47:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:47:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:47:07,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:07,400 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-04 12:47:07,400 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:07,400 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-04 12:47:07,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:07,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:07,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:07,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:07,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:07,670 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:07,830 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 12:47:07,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:07,830 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 12:47:07,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:07,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:07,997 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 12:47:08,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:08,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:47:08,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:47:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:47:08,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:08,019 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-04 12:47:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:08,069 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:47:08,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:47:08,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:47:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:08,070 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:47:08,071 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:47:08,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 19 [2018-10-04 12:47:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:47:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:47:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:47:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:47:08,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 12:47:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:08,075 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:47:08,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:47:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:47:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:47:08,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:08,075 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-04 12:47:08,076 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:08,076 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:08,076 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-04 12:47:08,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:08,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:08,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:08,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:08,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:08,702 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 12:47:08,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:08,703 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 12:47:08,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:08,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:08,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:08,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:08,874 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 12:47:08,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:08,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:47:08,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:47:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:47:08,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:08,895 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-04 12:47:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:08,987 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:47:08,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:47:08,987 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:47:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:08,988 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:47:08,988 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:47:08,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 20 [2018-10-04 12:47:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:47:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:47:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:47:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:47:08,992 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 12:47:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:08,992 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:47:08,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:47:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:47:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:47:08,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:08,993 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-04 12:47:08,993 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:08,994 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-04 12:47:08,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:08,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:08,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:08,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:08,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:09,542 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:09,689 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 12:47:09,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:09,689 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 12:47:09,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:09,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:47:09,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:09,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:09,974 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 12:47:09,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:09,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:47:09,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:47:09,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:47:09,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:09,996 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-04 12:47:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:10,052 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:47:10,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:47:10,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:47:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:10,053 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:47:10,053 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:47:10,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 21 [2018-10-04 12:47:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:47:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:47:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:47:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:47:10,056 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 12:47:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:10,056 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:47:10,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:47:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:47:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:47:10,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:10,057 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-04 12:47:10,057 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:10,057 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-04 12:47:10,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:10,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:10,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:10,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:10,475 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:10,673 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:10,679 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 12:47:10,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:10,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:10,687 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:10,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:10,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:10,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:10,858 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 12:47:10,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:10,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:47:10,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:47:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:47:10,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:10,880 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-04 12:47:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:11,044 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:47:11,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:47:11,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 12:47:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:11,045 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:47:11,045 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:47:11,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 7 [2018-10-04 12:47:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:47:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:47:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:47:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:47:11,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 12:47:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:11,049 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:47:11,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:47:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:47:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:47:11,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:11,050 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-04 12:47:11,050 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:11,050 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-04 12:47:11,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:11,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:11,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:11,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:11,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:11,829 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:12,173 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:12,213 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 12:47:12,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:12,213 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 12:47:12,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:12,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:47:12,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:12,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:12,711 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 12:47:12,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:12,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:47:12,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:47:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:47:12,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:12,734 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-04 12:47:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:12,875 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:47:12,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:47:12,875 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:47:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:12,876 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:47:12,876 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:47:12,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 8 [2018-10-04 12:47:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:47:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:47:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:47:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:47:12,880 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 12:47:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:12,880 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:47:12,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:47:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:47:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:47:12,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:12,881 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-04 12:47:12,881 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:12,881 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-04 12:47:12,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:12,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:12,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:12,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:12,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:13,241 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:13,689 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:13,950 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 12:47:13,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:13,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:13,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:14,112 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:47:14,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:14,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:14,766 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 12:47:14,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:14,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:47:14,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:47:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:47:14,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:14,787 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-04 12:47:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:14,858 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:47:14,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:47:14,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 12:47:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:14,859 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:47:14,859 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:47:14,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.7s impTime 9 [2018-10-04 12:47:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:47:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:47:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:47:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:47:14,862 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 12:47:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:14,862 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:47:14,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:47:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:47:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:47:14,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:14,863 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-04 12:47:14,863 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:14,863 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-04 12:47:14,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:14,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:14,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:14,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:15,192 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:15,602 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:15,713 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 12:47:15,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:15,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:15,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:15,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:15,943 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 12:47:15,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:15,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:47:15,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:47:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:47:15,965 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:15,965 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-04 12:47:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:16,065 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:47:16,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:47:16,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:47:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:16,066 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:47:16,066 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:47:16,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 10 [2018-10-04 12:47:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:47:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:47:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:47:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:47:16,070 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-04 12:47:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:16,070 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:47:16,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:47:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:47:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:47:16,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:16,071 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-04 12:47:16,072 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:16,072 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-04 12:47:16,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:16,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:16,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:16,339 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:17,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:17,308 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 12:47:17,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:17,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:17,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:17,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:17,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:17,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:17,502 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 12:47:17,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:17,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:47:17,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:47:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:47:17,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:17,524 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-04 12:47:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:17,650 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:47:17,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:47:17,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 12:47:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:17,651 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:47:17,651 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:47:17,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 11 [2018-10-04 12:47:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:47:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:47:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:47:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:47:17,654 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-04 12:47:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:17,655 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:47:17,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:47:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:47:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:47:17,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:17,656 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-04 12:47:17,656 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:17,656 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-04 12:47:17,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:17,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:17,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:17,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:17,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:18,150 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:18,361 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:18,440 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 12:47:18,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:18,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:18,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:18,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:47:18,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:18,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:18,812 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 12:47:18,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:18,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:47:18,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:47:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:47:18,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:18,833 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-04 12:47:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:18,938 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:47:18,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:47:18,941 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:47:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:18,942 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:47:18,942 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:47:18,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 12 [2018-10-04 12:47:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:47:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:47:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:47:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:47:18,945 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-04 12:47:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:18,945 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:47:18,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:47:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:47:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:47:18,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:18,946 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-04 12:47:18,946 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:18,946 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-04 12:47:18,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:18,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:18,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:18,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:18,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:19,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:19,726 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:20,515 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 12:47:20,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:20,516 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 12:47:20,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:20,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:20,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:20,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:20,702 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 12:47:20,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:20,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:47:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:47:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:47:20,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:20,723 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-04 12:47:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:20,871 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:47:20,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:47:20,871 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 12:47:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:20,872 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:47:20,872 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:47:20,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 13 [2018-10-04 12:47:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:47:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:47:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:47:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:47:20,876 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-04 12:47:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:20,876 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:47:20,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:47:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:47:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:47:20,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:20,877 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-04 12:47:20,877 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:20,877 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-04 12:47:20,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:20,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:20,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:20,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:20,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:21,990 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:22,364 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:22,627 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 12:47:22,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:22,627 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 12:47:22,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:23,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:47:23,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:23,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:23,423 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 12:47:23,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:23,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:47:23,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:47:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:47:23,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:23,445 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-04 12:47:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:23,528 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:47:23,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:47:23,529 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:47:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:23,529 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:47:23,529 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:47:23,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 14 [2018-10-04 12:47:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:47:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:47:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:47:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:47:23,532 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-04 12:47:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:23,532 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:47:23,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:47:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:47:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:47:23,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:23,533 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-04 12:47:23,533 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:23,533 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-04 12:47:23,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:23,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:23,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:23,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:23,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:23,774 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:24,168 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:24,325 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 12:47:24,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:24,325 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 12:47:24,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:24,551 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:47:24,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:24,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:24,717 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 12:47:24,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:24,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:47:24,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:47:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:47:24,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:24,739 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-04 12:47:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:24,799 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:47:24,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:47:24,799 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 12:47:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:24,801 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:47:24,801 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:47:24,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 15 [2018-10-04 12:47:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:47:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:47:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:47:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:47:24,805 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-04 12:47:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:24,805 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:47:24,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:47:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:47:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:47:24,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:24,806 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-04 12:47:24,806 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:24,806 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-04 12:47:24,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:24,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:27,012 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:27,776 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:28,084 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 12:47:28,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:28,085 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 12:47:28,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:28,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:28,294 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 12:47:28,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:28,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:47:28,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:47:28,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:47:28,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:28,316 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-04 12:47:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:28,426 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:47:28,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:47:28,427 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:47:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:28,428 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:47:28,428 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:47:28,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.2s impTime 16 [2018-10-04 12:47:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:47:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:47:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:47:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:47:28,430 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-04 12:47:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:28,431 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:47:28,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:47:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:47:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:47:28,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:28,431 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-04 12:47:28,431 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:28,432 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-04 12:47:28,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:28,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:28,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:28,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:28,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:28,750 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:28,937 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:29,126 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 12:47:29,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:29,126 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 12:47:29,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:29,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:29,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:29,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:29,565 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 12:47:29,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:29,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:47:29,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:47:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:47:29,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:29,586 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-04 12:47:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:29,815 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:47:29,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:47:29,815 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 12:47:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:29,816 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:47:29,816 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:47:29,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 17 [2018-10-04 12:47:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:47:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:47:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:47:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:47:29,820 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-04 12:47:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:29,820 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:47:29,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:47:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:47:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:47:29,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:29,821 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-04 12:47:29,821 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:29,821 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-04 12:47:29,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:29,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:29,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:29,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:29,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:30,168 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:30,345 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:30,579 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 12:47:30,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:30,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:30,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:30,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:47:30,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:30,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:31,085 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 12:47:31,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:31,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:47:31,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:47:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:47:31,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:31,107 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-04 12:47:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:31,185 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:47:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:47:31,185 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:47:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:31,186 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:47:31,186 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:47:31,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 18 [2018-10-04 12:47:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:47:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:47:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:47:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:47:31,189 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-04 12:47:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:31,189 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:47:31,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:47:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:47:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:47:31,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:31,190 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-04 12:47:31,191 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:31,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-04 12:47:31,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:31,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:31,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:31,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:31,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:32,337 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:32,762 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:33,219 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 12:47:33,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:33,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:33,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:33,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:33,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:33,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:33,452 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 12:47:33,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:33,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:47:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:47:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:47:33,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:33,474 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-04 12:47:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:33,572 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:47:33,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:47:33,572 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 12:47:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:33,573 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:47:33,573 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:47:33,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 19 [2018-10-04 12:47:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:47:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:47:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:47:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:47:33,576 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-04 12:47:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:33,577 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:47:33,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:47:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:47:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:47:33,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:33,578 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-04 12:47:33,578 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:33,578 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:33,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-04 12:47:33,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:33,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:33,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:33,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:33,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:34,094 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:34,303 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:34,546 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 12:47:34,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:34,546 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 12:47:34,555 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:35,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:47:35,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:35,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:35,596 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 12:47:35,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:35,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:47:35,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:47:35,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:47:35,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:35,619 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-04 12:47:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:35,698 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:47:35,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:47:35,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:47:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:35,700 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:47:35,700 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:47:35,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 20 [2018-10-04 12:47:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:47:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:47:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:47:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:47:35,704 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-04 12:47:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:35,705 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:47:35,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:47:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:47:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:47:35,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:35,706 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-04 12:47:35,706 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:35,706 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-04 12:47:35,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:35,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:35,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:35,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:36,459 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:36,788 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:36,965 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 12:47:36,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:36,965 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 12:47:36,973 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:37,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:47:37,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:37,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:37,560 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 12:47:37,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:37,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:47:37,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:47:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:47:37,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:37,582 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-04 12:47:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:37,721 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:47:37,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:47:37,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 12:47:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:37,723 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:47:37,723 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:47:37,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 21 [2018-10-04 12:47:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:47:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:47:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:47:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:47:37,728 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-04 12:47:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:37,728 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:47:37,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:47:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:47:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:47:37,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:37,729 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-04 12:47:37,729 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:37,729 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-04 12:47:37,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:37,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:37,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:37,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:37,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:38,304 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:38,473 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:38,822 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:38,831 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 12:47:38,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:38,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:38,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:38,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:40,072 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 12:47:40,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:40,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:47:40,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:47:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:47:40,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:40,094 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-04 12:47:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:40,184 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:47:40,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:47:40,185 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:47:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:40,186 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:47:40,186 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:47:40,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 0.7s impTime 7 [2018-10-04 12:47:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:47:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:47:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:47:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 12:47:40,190 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-04 12:47:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:40,190 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 12:47:40,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:47:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 12:47:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:47:40,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:40,191 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-04 12:47:40,192 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:40,192 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-04 12:47:40,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:40,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:40,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:40,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:40,854 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:41,274 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:41,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:41,938 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 12:47:41,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:41,938 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 12:47:41,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:41,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:41,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:41,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:42,325 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 12:47:42,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:42,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:47:42,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:47:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:47:42,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:42,345 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-04 12:47:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:42,550 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:47:42,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:47:42,550 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 12:47:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:42,551 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:47:42,551 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:47:42,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 8 [2018-10-04 12:47:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:47:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:47:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:47:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:47:42,555 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-04 12:47:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:42,555 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:47:42,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:47:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:47:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:47:42,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:42,556 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-04 12:47:42,557 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:42,557 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-04 12:47:42,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:42,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:42,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:42,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:42,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:42,916 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:43,246 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:43,776 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:43,880 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 12:47:43,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:43,880 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 12:47:43,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:44,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:47:44,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:44,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:44,792 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 12:47:44,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:44,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:47:44,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:47:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:47:44,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:44,815 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-04 12:47:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:44,927 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:47:44,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:47:44,927 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:47:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:44,928 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:47:44,928 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:47:44,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime 9 [2018-10-04 12:47:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:47:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:47:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:47:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 12:47:44,931 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-04 12:47:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:44,931 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 12:47:44,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:47:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 12:47:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:47:44,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:44,932 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-04 12:47:44,932 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:44,932 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-04 12:47:44,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:44,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:44,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:44,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:45,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:45,673 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:46,236 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:46,372 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 12:47:46,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:46,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:46,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:47:46,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:47:46,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:46,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:46,626 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 12:47:46,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:46,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:47:46,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:47:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:47:46,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:46,647 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-04 12:47:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:46,758 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:47:46,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:47:46,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 12:47:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:46,759 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:47:46,759 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:47:46,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 10 [2018-10-04 12:47:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:47:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:47:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:47:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 12:47:46,762 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-04 12:47:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:46,762 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 12:47:46,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:47:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 12:47:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:47:46,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:46,763 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-04 12:47:46,763 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:46,763 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-04 12:47:46,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:46,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:46,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:47,011 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:47,649 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:48,264 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:48,372 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 12:47:48,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:48,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:48,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:47:49,796 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:47:49,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:49,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:49,983 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 12:47:50,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:50,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:47:50,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:47:50,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:47:50,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:50,006 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-04 12:47:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:50,105 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 12:47:50,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:47:50,105 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:47:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:50,106 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:47:50,107 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:47:50,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 11 [2018-10-04 12:47:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:47:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:47:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:47:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 12:47:50,109 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-04 12:47:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:50,110 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 12:47:50,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:47:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 12:47:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:47:50,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:50,111 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-04 12:47:50,111 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:50,111 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-04 12:47:50,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:50,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:50,368 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:50,590 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,038 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:51,284 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 12:47:51,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:51,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:51,291 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:47:51,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:47:51,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:51,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:52,042 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 12:47:52,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:52,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:47:52,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:47:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:47:52,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:52,065 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-04 12:47:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:52,958 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 12:47:52,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:47:52,959 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 12:47:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:52,960 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:47:52,960 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:47:52,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 12 [2018-10-04 12:47:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:47:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:47:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:47:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 12:47:52,964 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-04 12:47:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:52,964 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 12:47:52,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:47:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 12:47:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:47:52,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:52,965 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-04 12:47:52,966 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:52,966 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-04 12:47:52,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:52,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:52,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:52,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:52,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:53,265 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:53,471 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:53,842 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:54,150 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 12:47:54,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:54,150 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 12:47:54,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:54,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:54,430 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 12:47:54,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:54,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:47:54,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:47:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:47:54,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:54,451 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-04 12:47:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:54,752 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 12:47:54,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:47:54,753 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:47:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:54,754 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:47:54,754 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:47:54,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 13 [2018-10-04 12:47:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:47:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:47:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:47:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-04 12:47:54,757 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-04 12:47:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:54,757 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-04 12:47:54,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:47:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-04 12:47:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:47:54,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:54,758 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-04 12:47:54,759 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:54,759 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-04 12:47:54,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:54,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:54,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:54,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:47:54,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:55,007 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:55,223 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:55,695 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:56,052 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 12:47:56,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:56,052 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 12:47:56,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:47:56,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:47:56,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:56,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:47:57,206 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 12:47:57,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:47:57,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:47:57,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:47:57,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:47:57,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:47:57,227 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-04 12:47:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:47:57,340 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 12:47:57,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:47:57,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-04 12:47:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:47:57,342 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:47:57,342 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:47:57,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.0s impTime 14 [2018-10-04 12:47:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:47:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:47:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:47:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 12:47:57,345 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-04 12:47:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:47:57,345 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 12:47:57,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:47:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 12:47:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:47:57,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:47:57,346 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-04 12:47:57,346 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:47:57,346 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:47:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-04 12:47:57,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:47:57,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:47:57,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:57,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:47:57,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:47:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:47:57,939 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:47:58,314 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:58,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:47:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:47:59,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:47:59,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:47:59,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:47:59,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:47:59,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:47:59,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:00,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:00,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:48:00,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:48:00,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:48:00,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:00,075 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-04 12:48:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:00,177 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 12:48:00,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:48:00,177 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:48:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:00,178 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:48:00,178 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:48:00,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 15 [2018-10-04 12:48:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:48:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:48:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:48:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-04 12:48:00,182 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-04 12:48:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:00,182 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-04 12:48:00,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:48:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-04 12:48:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 12:48:00,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:00,183 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-04 12:48:00,183 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:00,183 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-04 12:48:00,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:00,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:00,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:00,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:00,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:00,521 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:00,840 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:01,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:01,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:01,779 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 12:48:01,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:01,851 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:01,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:01,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:02,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:02,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:48:02,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:48:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:48:02,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:02,088 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-04 12:48:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:02,207 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 12:48:02,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:48:02,210 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-04 12:48:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:02,211 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:48:02,211 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:48:02,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 16 [2018-10-04 12:48:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:48:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 12:48:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:48:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 12:48:02,215 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-04 12:48:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:02,215 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 12:48:02,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:48:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 12:48:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:48:02,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:02,216 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-04 12:48:02,217 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:02,217 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-04 12:48:02,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:02,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:02,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:02,424 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:02,958 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:03,494 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:04,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:04,003 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 12:48:04,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:06,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:48:06,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:06,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:06,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:06,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:48:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:48:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:48:06,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:06,415 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-04 12:48:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:06,590 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 12:48:06,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:48:06,590 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 12:48:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:06,591 INFO L225 Difference]: With dead ends: 127 [2018-10-04 12:48:06,591 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:48:06,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 17 [2018-10-04 12:48:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:48:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 12:48:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:48:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-04 12:48:06,594 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-04 12:48:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:06,595 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-04 12:48:06,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:48:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-04 12:48:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:48:06,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:06,596 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-04 12:48:06,596 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:06,596 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-04 12:48:06,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:06,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:06,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:06,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:06,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:06,840 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:07,350 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:08,242 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:08,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:08,835 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 12:48:08,845 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:09,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:48:09,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:09,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:09,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:09,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:48:09,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:48:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:48:09,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:09,709 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-04 12:48:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:09,910 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 12:48:09,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:48:09,911 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-04 12:48:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:09,912 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:48:09,912 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:48:09,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 18 [2018-10-04 12:48:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:48:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:48:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:48:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 12:48:09,914 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-04 12:48:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:09,915 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 12:48:09,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:48:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 12:48:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:48:09,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:09,915 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-04 12:48:09,916 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:09,916 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-04 12:48:09,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:09,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:09,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:09,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:10,149 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:10,315 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:10,662 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:11,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:11,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:48:11,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:11,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:11,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:11,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:48:11,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:48:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:48:11,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:11,371 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-04 12:48:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:11,493 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 12:48:11,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:48:11,494 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 12:48:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:11,494 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:48:11,494 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:48:11,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 19 [2018-10-04 12:48:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:48:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 12:48:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:48:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-04 12:48:11,497 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-04 12:48:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:11,497 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-04 12:48:11,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:48:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-04 12:48:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:48:11,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:11,499 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-04 12:48:11,499 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:11,499 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-04 12:48:11,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:11,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:11,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:11,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:11,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:11,800 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:12,107 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:12,318 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:12,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:12,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:48:12,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:12,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:12,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:12,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:13,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:13,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:48:13,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:48:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:48:13,081 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:13,082 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-04 12:48:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:13,267 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 12:48:13,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:48:13,268 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-04 12:48:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:13,269 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:48:13,269 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:48:13,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 20 [2018-10-04 12:48:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:48:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:48:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:48:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 12:48:13,273 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-04 12:48:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:13,273 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 12:48:13,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:48:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 12:48:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:48:13,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:13,274 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-04 12:48:13,275 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:13,275 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-04 12:48:13,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:13,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:13,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:13,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:13,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:13,532 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:13,727 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:14,033 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:14,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:14,471 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 12:48:14,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:15,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:48:15,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:15,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:15,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:15,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:48:15,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:48:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:48:15,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:15,621 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-04 12:48:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:15,742 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 12:48:15,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:48:15,742 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 12:48:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:15,743 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:48:15,743 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:48:15,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 21 [2018-10-04 12:48:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:48:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:48:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:48:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-04 12:48:15,746 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-04 12:48:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:15,747 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-04 12:48:15,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:48:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-04 12:48:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:48:15,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:15,748 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-04 12:48:15,748 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:15,748 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-04 12:48:15,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:15,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:15,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:15,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:16,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:16,449 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:17,065 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:17,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:17,835 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 12:48:17,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:17,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:17,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:17,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:18,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:18,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:48:18,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:48:18,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:48:18,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:18,466 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-04 12:48:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:18,639 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 12:48:18,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:48:18,639 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-04 12:48:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:18,640 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:48:18,640 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:48:18,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.8s impTime 22 [2018-10-04 12:48:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:48:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 12:48:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:48:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 12:48:18,644 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-04 12:48:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:18,644 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 12:48:18,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:48:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 12:48:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:48:18,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:18,645 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-04 12:48:18,645 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:18,645 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-04 12:48:18,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:18,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:18,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:18,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:18,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:18,871 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:19,071 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:19,470 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:20,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:20,290 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 12:48:20,297 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:23,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:48:23,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:23,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:23,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:23,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:48:23,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:48:23,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:48:23,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:23,627 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-04 12:48:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:23,817 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 12:48:23,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:48:23,818 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 12:48:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:23,819 INFO L225 Difference]: With dead ends: 139 [2018-10-04 12:48:23,819 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:48:23,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 23 [2018-10-04 12:48:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:48:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:48:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:48:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-04 12:48:23,822 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-04 12:48:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:23,822 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-04 12:48:23,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:48:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-04 12:48:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 12:48:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:23,823 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-04 12:48:23,823 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:23,823 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-04 12:48:23,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:23,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:23,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:24,054 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:24,258 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:24,564 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:25,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:25,126 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 12:48:25,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:25,946 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:48:25,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:25,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:26,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:26,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:48:26,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:48:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:48:26,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:26,251 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-04 12:48:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:26,395 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 12:48:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:48:26,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-04 12:48:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:26,396 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:48:26,396 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:48:26,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 24 [2018-10-04 12:48:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:48:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:48:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:48:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 12:48:26,400 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-04 12:48:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:26,400 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 12:48:26,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:48:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 12:48:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:48:26,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:26,401 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-04 12:48:26,401 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:26,401 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-04 12:48:26,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:26,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:26,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:26,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:26,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:26,618 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:26,924 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:27,462 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:28,614 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:28,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:28,632 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 12:48:28,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:28,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:29,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:29,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:48:29,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:48:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:48:29,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:29,026 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-04 12:48:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:29,216 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 12:48:29,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:48:29,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 12:48:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:29,217 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:48:29,217 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:48:29,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 8 [2018-10-04 12:48:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:48:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:48:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:48:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-04 12:48:29,220 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-04 12:48:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:29,221 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-04 12:48:29,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:48:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-04 12:48:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:48:29,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:29,222 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-04 12:48:29,222 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:29,222 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-04 12:48:29,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:29,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:29,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:29,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:29,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:29,526 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:30,038 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:30,378 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:31,344 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:31,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:31,422 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 12:48:31,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:31,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:31,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:31,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:31,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:31,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:48:31,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:48:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:48:31,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:31,740 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-04 12:48:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:31,937 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 12:48:31,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:48:31,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-04 12:48:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:31,938 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:48:31,938 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:48:31,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 9 [2018-10-04 12:48:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:48:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:48:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:48:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 12:48:31,942 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-04 12:48:31,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:31,942 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 12:48:31,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:48:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 12:48:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:48:31,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:31,943 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-04 12:48:31,943 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:31,943 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-04 12:48:31,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:31,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:31,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:31,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:31,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:32,166 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:32,533 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:33,130 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:34,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:34,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:34,458 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 12:48:34,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:35,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:48:35,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:35,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:36,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:36,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:48:36,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:48:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:48:36,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:36,161 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-04 12:48:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:36,380 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 12:48:36,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:48:36,381 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 12:48:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:36,381 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:48:36,381 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:48:36,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime 10 [2018-10-04 12:48:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:48:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:48:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:48:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-04 12:48:36,385 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-04 12:48:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:36,386 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-04 12:48:36,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:48:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-04 12:48:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 12:48:36,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:36,386 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-04 12:48:36,387 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:36,387 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-04 12:48:36,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:36,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:36,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:36,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:36,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:36,698 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:37,066 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:37,637 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:38,815 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:39,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:39,015 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 12:48:39,022 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:48:39,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:48:39,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:39,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:39,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:39,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:48:39,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:48:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:48:39,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:39,345 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-04 12:48:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:39,557 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 12:48:39,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:48:39,557 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-04 12:48:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:39,558 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:48:39,558 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:48:39,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 11 [2018-10-04 12:48:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:48:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 12:48:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:48:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 12:48:39,561 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-04 12:48:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:39,562 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 12:48:39,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:48:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 12:48:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:48:39,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:39,562 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-04 12:48:39,562 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:39,563 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-04 12:48:39,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:39,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:39,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:39,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:39,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:39,795 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:39,989 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:40,348 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:41,327 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:41,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:41,584 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 12:48:41,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:48:45,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:48:45,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:45,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:46,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:46,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:48:46,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:48:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:48:46,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:46,002 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-04 12:48:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:46,196 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 12:48:46,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:48:46,196 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 12:48:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:46,197 INFO L225 Difference]: With dead ends: 151 [2018-10-04 12:48:46,197 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:48:46,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 12 [2018-10-04 12:48:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:48:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:48:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:48:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-04 12:48:46,201 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-04 12:48:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:46,201 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-04 12:48:46,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:48:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-04 12:48:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:48:46,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:46,202 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-04 12:48:46,202 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:46,203 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-04 12:48:46,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:46,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:46,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:46,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:46,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:46,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:46,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:47,302 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:47,567 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:47,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:47,696 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 12:48:47,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:48:48,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:48:48,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:48,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:49,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:49,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:48:49,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:48:49,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:48:49,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:49,290 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-04 12:48:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:49,427 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 12:48:49,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:48:49,427 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-04 12:48:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:49,428 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:48:49,428 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:48:49,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 13 [2018-10-04 12:48:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:48:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:48:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:48:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 12:48:49,433 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-04 12:48:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:49,433 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 12:48:49,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:48:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 12:48:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:48:49,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:49,434 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-04 12:48:49,434 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:49,435 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-04 12:48:49,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:49,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:49,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:49,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:49,777 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:50,141 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:50,758 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:51,707 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:52,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:52,099 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 12:48:52,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:52,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:52,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:52,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:48:52,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:48:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:48:52,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:52,468 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-04 12:48:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:52,692 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 12:48:52,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:48:52,692 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 12:48:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:52,693 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:48:52,693 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:48:52,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime 14 [2018-10-04 12:48:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:48:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 12:48:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 12:48:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-04 12:48:52,697 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-04 12:48:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:52,697 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-04 12:48:52,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:48:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-04 12:48:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:48:52,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:52,698 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-04 12:48:52,698 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:52,698 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-04 12:48:52,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:52,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:52,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:48:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:52,887 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:53,274 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:53,508 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:54,053 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:54,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:54,391 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 12:48:54,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:48:54,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:48:54,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:54,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:54,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:54,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:48:54,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:48:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:48:54,774 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:54,774 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-04 12:48:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:54,934 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 12:48:54,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:48:54,935 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-04 12:48:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:54,935 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:48:54,936 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:48:54,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 15 [2018-10-04 12:48:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:48:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:48:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:48:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 12:48:54,952 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-04 12:48:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:54,952 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 12:48:54,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:48:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 12:48:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:48:54,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:54,953 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-04 12:48:54,953 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:54,953 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-04 12:48:54,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:54,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:54,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:54,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:54,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:55,357 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:48:55,671 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:56,186 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:48:57,172 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:48:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:57,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:48:57,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:48:57,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:48:59,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:48:59,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:48:59,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:48:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:48:59,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:48:59,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:48:59,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:48:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:48:59,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:48:59,449 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-04 12:48:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:48:59,635 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 12:48:59,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:48:59,636 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 12:48:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:48:59,636 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:48:59,636 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:48:59,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 16 [2018-10-04 12:48:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:48:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:48:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:48:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-04 12:48:59,639 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-04 12:48:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:48:59,639 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-04 12:48:59,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:48:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-04 12:48:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:48:59,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:48:59,640 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-04 12:48:59,640 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:48:59,641 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:48:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-04 12:48:59,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:48:59,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:48:59,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:59,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:48:59,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:48:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:48:59,870 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:00,057 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:00,453 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:01,434 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:02,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:02,014 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 12:49:02,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:02,096 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:02,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:02,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:02,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:02,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:49:02,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:49:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:49:02,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:02,369 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-04 12:49:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:03,035 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 12:49:03,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:49:03,035 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-04 12:49:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:03,036 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:49:03,036 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:49:03,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 17 [2018-10-04 12:49:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:49:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 12:49:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:49:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 12:49:03,040 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-04 12:49:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:03,041 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 12:49:03,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:49:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 12:49:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:49:03,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:03,042 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-04 12:49:03,042 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:03,042 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-04 12:49:03,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:03,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:03,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:03,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:03,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:03,338 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:03,509 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:03,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:05,156 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:05,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:05,812 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 12:49:05,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:11,668 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:49:11,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:11,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:11,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:11,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:49:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:49:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:49:11,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:11,949 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-04 12:49:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:12,207 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 12:49:12,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:49:12,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 12:49:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:12,208 INFO L225 Difference]: With dead ends: 163 [2018-10-04 12:49:12,208 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:49:12,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 18 [2018-10-04 12:49:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:49:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:49:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:49:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-04 12:49:12,212 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-04 12:49:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:12,213 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-04 12:49:12,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:49:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-04 12:49:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:49:12,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:12,214 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-04 12:49:12,214 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:12,214 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-04 12:49:12,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:12,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:12,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:12,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:12,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:12,489 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:12,899 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:13,506 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:14,208 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:14,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:14,445 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 12:49:14,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:15,912 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:49:15,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:15,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:16,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:16,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:49:16,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:49:16,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:49:16,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:16,215 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-04 12:49:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:16,406 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 12:49:16,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:49:16,406 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-04 12:49:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:16,407 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:49:16,407 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:49:16,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 19 [2018-10-04 12:49:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:49:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:49:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:49:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 12:49:16,411 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-04 12:49:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:16,411 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 12:49:16,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:49:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 12:49:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:49:16,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:16,413 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-04 12:49:16,413 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:16,413 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-04 12:49:16,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:16,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:16,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:16,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:16,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:16,685 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:16,927 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:17,222 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:17,838 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:18,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:18,388 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 12:49:18,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:18,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:18,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:18,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:49:18,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:49:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:49:18,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:18,825 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-04 12:49:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:19,041 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 12:49:19,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:49:19,042 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 12:49:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:19,042 INFO L225 Difference]: With dead ends: 167 [2018-10-04 12:49:19,042 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 12:49:19,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 20 [2018-10-04 12:49:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 12:49:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 12:49:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:49:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-04 12:49:19,046 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-04 12:49:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:19,046 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-04 12:49:19,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:49:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-04 12:49:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:49:19,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:19,047 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-04 12:49:19,047 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:19,048 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-04 12:49:19,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:19,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:19,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:19,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:19,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:19,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:19,885 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:20,181 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:21,177 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:22,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:22,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:22,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:22,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:22,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:22,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:22,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:22,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:49:22,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:49:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:49:22,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:22,400 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-04 12:49:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:22,671 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 12:49:22,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:49:22,671 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-04 12:49:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:22,672 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:49:22,672 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:49:22,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.5s impTime 21 [2018-10-04 12:49:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:49:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:49:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:49:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 12:49:22,675 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-04 12:49:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:22,675 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 12:49:22,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:49:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 12:49:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:49:22,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:22,676 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-04 12:49:22,676 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:22,676 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-04 12:49:22,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:22,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:22,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:22,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:22,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:23,043 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:23,209 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:23,552 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:24,333 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:25,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:25,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:25,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:27,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 12:49:27,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:27,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:27,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:27,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:49:27,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:49:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:49:27,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:27,729 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-04 12:49:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:27,962 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-04 12:49:27,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:49:27,963 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 12:49:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:27,964 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:49:27,964 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:49:27,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 22 [2018-10-04 12:49:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:49:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:49:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:49:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-04 12:49:27,968 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-04 12:49:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:27,968 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-04 12:49:27,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:49:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-04 12:49:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:49:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:27,969 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-04 12:49:27,969 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:27,969 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-04 12:49:27,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:27,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:27,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:28,201 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:28,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:29,229 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:29,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:30,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:30,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:30,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:30,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:30,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:30,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:30,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:30,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:49:30,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:49:30,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:49:30,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:30,625 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-04 12:49:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:30,832 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 12:49:30,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:49:30,832 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-04 12:49:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:30,833 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:49:30,833 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:49:30,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.8s impTime 23 [2018-10-04 12:49:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:49:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:49:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:49:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 12:49:30,836 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-04 12:49:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:30,836 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 12:49:30,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:49:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 12:49:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:49:30,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:30,837 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-04 12:49:30,837 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:30,837 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-04 12:49:30,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:30,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:30,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:30,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:30,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:31,020 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:31,326 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:31,836 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:32,809 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:33,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:33,170 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 12:49:33,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:49:40,875 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 12:49:40,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:40,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:41,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:41,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:49:41,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:49:41,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:49:41,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:41,184 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-04 12:49:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:41,419 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-04 12:49:41,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:49:41,424 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 12:49:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:41,425 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:49:41,425 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:49:41,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 24 [2018-10-04 12:49:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:49:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 12:49:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:49:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-04 12:49:41,429 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-04 12:49:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:41,430 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-04 12:49:41,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:49:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-04 12:49:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:49:41,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:41,431 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-04 12:49:41,431 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:41,431 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:41,431 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-04 12:49:41,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:41,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:41,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:41,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:41,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:41,611 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:41,818 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:42,111 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:42,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:42,895 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:42,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:42,922 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 12:49:42,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:49:44,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 12:49:44,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:44,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:45,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:45,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:49:45,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:49:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:49:45,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:45,231 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-04 12:49:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:45,649 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 12:49:45,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:49:45,650 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-04 12:49:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:45,650 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:49:45,650 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:49:45,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime 8 [2018-10-04 12:49:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:49:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:49:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:49:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 12:49:45,654 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-04 12:49:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:45,654 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 12:49:45,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:49:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 12:49:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:49:45,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:45,656 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-04 12:49:45,656 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:45,656 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-04 12:49:45,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:45,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:45,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:45,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:45,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:45,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:46,062 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:46,391 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:46,570 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:46,860 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:46,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:46,888 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 12:49:46,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:46,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:47,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:47,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:49:47,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:49:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:49:47,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:47,291 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-04 12:49:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:47,482 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-04 12:49:47,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:49:47,482 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 12:49:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:47,483 INFO L225 Difference]: With dead ends: 179 [2018-10-04 12:49:47,483 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 12:49:47,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 8 [2018-10-04 12:49:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 12:49:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 12:49:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 12:49:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-04 12:49:47,487 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-04 12:49:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:47,487 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-04 12:49:47,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:49:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-04 12:49:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 12:49:47,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:47,488 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-04 12:49:47,488 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:47,488 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-04 12:49:47,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:47,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:47,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:49:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:47,678 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:47,813 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:48,064 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:48,653 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:49,187 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:49,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:49,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:49,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:49:49,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:49:49,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:49,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:49,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:49,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:49:49,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:49:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:49:49,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:49,641 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-04 12:49:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:49,944 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 12:49:49,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:49:49,944 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-04 12:49:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:49,945 INFO L225 Difference]: With dead ends: 181 [2018-10-04 12:49:49,945 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:49:49,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 9 [2018-10-04 12:49:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:49:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 12:49:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:49:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 12:49:49,948 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-04 12:49:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 12:49:49,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:49:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 12:49:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:49:49,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:49,949 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-04 12:49:49,950 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:49,950 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:49,950 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-04 12:49:49,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:49,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:49,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:49,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:49,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:50,405 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:50,592 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:50,806 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:51,325 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:51,955 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:52,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:52,098 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 12:49:52,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:49:54,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 12:49:54,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:54,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:55,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:55,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:49:55,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:49:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:49:55,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:55,191 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-04 12:49:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:55,455 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-04 12:49:55,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:49:55,455 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 12:49:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:55,456 INFO L225 Difference]: With dead ends: 183 [2018-10-04 12:49:55,457 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:49:55,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 11 [2018-10-04 12:49:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:49:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:49:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:49:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-04 12:49:55,460 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-04 12:49:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:55,460 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-04 12:49:55,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:49:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-04 12:49:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 12:49:55,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:55,461 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-04 12:49:55,461 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:55,461 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-04 12:49:55,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:55,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:55,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:55,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:55,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:55,709 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:55,845 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:56,155 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:56,572 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:57,117 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:57,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:57,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:57,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:49:57,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:49:57,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:49:57,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:49:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:57,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:49:57,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:49:57,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:49:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:49:57,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:49:57,657 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-04 12:49:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:49:57,954 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 12:49:57,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:49:57,954 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-04 12:49:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:49:57,955 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:49:57,955 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:49:57,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 11 [2018-10-04 12:49:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:49:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 12:49:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:49:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 12:49:57,959 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-04 12:49:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:49:57,959 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 12:49:57,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:49:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 12:49:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:49:57,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:49:57,960 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-04 12:49:57,961 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:49:57,961 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:49:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-04 12:49:57,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:49:57,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:49:57,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:57,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:49:57,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:49:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:49:58,147 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:49:58,359 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:58,686 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:49:58,865 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:59,159 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:49:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:49:59,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:49:59,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:49:59,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:50:09,457 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 12:50:09,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:09,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:09,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:09,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:50:09,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:50:09,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:50:09,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:09,779 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-04 12:50:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:09,981 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-04 12:50:09,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:50:09,981 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 12:50:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:09,982 INFO L225 Difference]: With dead ends: 187 [2018-10-04 12:50:09,982 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 12:50:09,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 12 [2018-10-04 12:50:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 12:50:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 12:50:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:50:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-04 12:50:09,986 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-04 12:50:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:09,986 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-04 12:50:09,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:50:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-04 12:50:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:50:09,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:09,987 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-04 12:50:09,987 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:09,987 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:09,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-04 12:50:09,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:09,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:09,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:09,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:09,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:10,245 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:10,433 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:10,918 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:11,517 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:11,736 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:11,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:11,825 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 12:50:11,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:50:14,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 12:50:14,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:14,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:14,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:14,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:50:14,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:50:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:50:14,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:14,598 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-04 12:50:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:14,840 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 12:50:14,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:50:14,840 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-04 12:50:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:14,841 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:50:14,841 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:50:14,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 14 [2018-10-04 12:50:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:50:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:50:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:50:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 12:50:14,845 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-04 12:50:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:14,846 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 12:50:14,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:50:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 12:50:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:50:14,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:14,847 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-04 12:50:14,847 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:14,847 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-04 12:50:14,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:14,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:14,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:14,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:14,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:15,027 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:15,209 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:15,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:16,247 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:16,502 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:16,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:16,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:50:16,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:16,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:17,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:17,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:50:17,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:50:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:50:17,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:17,036 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-04 12:50:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:17,276 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-04 12:50:17,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:50:17,276 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 12:50:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:17,277 INFO L225 Difference]: With dead ends: 191 [2018-10-04 12:50:17,277 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 12:50:17,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 15 [2018-10-04 12:50:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 12:50:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 12:50:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:50:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-04 12:50:17,281 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-04 12:50:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:17,282 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-04 12:50:17,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:50:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-04 12:50:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:50:17,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:17,283 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-04 12:50:17,283 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:17,283 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-04 12:50:17,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:17,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:17,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:17,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:17,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:17,522 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:17,755 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:18,094 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:18,340 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:18,592 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:18,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:18,755 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 12:50:18,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:50:18,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:50:18,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:18,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:19,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:19,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:50:19,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:50:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:50:19,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:19,225 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-04 12:50:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:19,473 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 12:50:19,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:50:19,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-04 12:50:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:19,474 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:50:19,474 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:50:19,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 16 [2018-10-04 12:50:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:50:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:50:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:50:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 12:50:19,478 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-04 12:50:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:19,478 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 12:50:19,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:50:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 12:50:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:50:19,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:19,479 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-04 12:50:19,480 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:19,480 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-04 12:50:19,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:19,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:19,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:19,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:19,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:19,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:19,778 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:19,982 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:20,355 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:20,903 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:21,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:21,401 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 12:50:21,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:50:25,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 12:50:25,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:25,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:25,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:25,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:50:25,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:50:25,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:50:25,355 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:25,356 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-04 12:50:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:25,679 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-04 12:50:25,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:50:25,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 12:50:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:25,680 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:50:25,680 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:50:25,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 16 [2018-10-04 12:50:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:50:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 12:50:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 12:50:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-04 12:50:25,683 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-04 12:50:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:25,683 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-04 12:50:25,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:50:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-04 12:50:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 12:50:25,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:25,684 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-04 12:50:25,685 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:25,685 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-04 12:50:25,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:25,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:25,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:25,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:25,903 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:26,304 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:26,558 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:27,090 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:27,734 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:28,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:28,133 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 12:50:28,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:50:28,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:50:28,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:28,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:28,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:28,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:50:28,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:50:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:50:28,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:28,568 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-04 12:50:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:28,879 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 12:50:28,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:50:28,880 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-04 12:50:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:28,881 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:50:28,881 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:50:28,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.9s impTime 17 [2018-10-04 12:50:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:50:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 12:50:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:50:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 12:50:28,884 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-04 12:50:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:28,884 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 12:50:28,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:50:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 12:50:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:50:28,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:28,885 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-04 12:50:28,885 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:28,885 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-04 12:50:28,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:28,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:28,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:29,084 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:29,219 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:29,402 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:29,792 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:30,257 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:30,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:30,621 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 12:50:30,629 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:50:43,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 12:50:43,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:43,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:44,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:44,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:50:44,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:50:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:50:44,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:44,237 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-04 12:50:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:44,540 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-04 12:50:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:50:44,540 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 12:50:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:44,541 INFO L225 Difference]: With dead ends: 199 [2018-10-04 12:50:44,541 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 12:50:44,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 19 [2018-10-04 12:50:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 12:50:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 12:50:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 12:50:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-04 12:50:44,545 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-04 12:50:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:44,545 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-04 12:50:44,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:50:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-04 12:50:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 12:50:44,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:44,547 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-04 12:50:44,547 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:44,547 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-04 12:50:44,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:44,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:44,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:50:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:44,771 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:50:45,009 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:45,365 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:50:45,743 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:45,946 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:50:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:46,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:46,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:50:46,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... [2018-10-04 12:50:49,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 12:50:49,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:50:49,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:49,225 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:50:49,425 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:49,426 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:50:49,431 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:50:49,431 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:50:49 BoogieIcfgContainer [2018-10-04 12:50:49,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:50:49,432 INFO L168 Benchmark]: Toolchain (without parser) took 244594.33 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.5 GB in the beginning and 985.0 MB in the end (delta: 469.1 MB). Peak memory consumption was 461.2 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:49,434 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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 12:50:49,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.93 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 12:50:49,435 INFO L168 Benchmark]: Boogie Preprocessor took 24.74 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 12:50:49,435 INFO L168 Benchmark]: RCFGBuilder took 353.41 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:49,436 INFO L168 Benchmark]: TraceAbstraction took 244161.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.4 GB in the beginning and 985.0 MB in the end (delta: 450.1 MB). Peak memory consumption was 442.2 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:49,441 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 0.19 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 46.93 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 24.74 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 353.41 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244161.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.4 GB in the beginning and 985.0 MB in the end (delta: 450.1 MB). Peak memory consumption was 442.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 197 with TraceHistMax 97, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 244.0s OverallTime, 97 OverallIterations, 97 TraceHistogramMax, 15.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 384 SDtfs, 0 SDslu, 7451 SDs, 0 SdLazy, 7547 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14157 GetRequests, 9501 SyntacticMatches, 0 SemanticMatches, 4656 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=96, 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: 0.3s AutomataMinimizationTime, 96 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 76.5s SatisfiabilityAnalysisTime, 140.9s InterpolantComputationTime, 19004 NumberOfCodeBlocks, 19004 NumberOfCodeBlocksAsserted, 2511 NumberOfCheckSat, 18813 ConstructedInterpolants, 0 QuantifiedInterpolants, 7263531 SizeOfPredicates, 95 NumberOfNonLiveVariables, 33155 ConjunctsInSsa, 4750 ConjunctsInUnsatCore, 191 InterpolantComputations, 1 PerfectInterpolantSequences, 0/589760 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/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-50-49-461.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-50-49-461.csv Completed graceful shutdown