java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/reve/004-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:21:12,605 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:21:12,608 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:21:12,618 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:21:12,619 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:21:12,622 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:21:12,623 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:21:12,625 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:21:12,627 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:21:12,627 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:21:12,629 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:21:12,629 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:21:12,630 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:21:12,631 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:21:12,632 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:21:12,633 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:21:12,635 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:21:12,637 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:21:12,638 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:21:12,639 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:21:12,640 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:21:12,643 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:21:12,643 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:21:12,643 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:21:12,644 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:21:12,645 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:21:12,645 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:21:12,646 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:21:12,647 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 01:21:12,647 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:21:12,648 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:21:12,649 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:21:12,649 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:21:12,649 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:21:12,650 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:21:12,650 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:21:12,663 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:21:12,663 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:21:12,664 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:21:12,664 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:21:12,665 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:21:12,665 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:21:12,665 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:21:12,666 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:21:12,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:21:12,666 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:21:12,666 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:21:12,666 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:21:12,667 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:21:12,667 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:21:12,667 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:21:12,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:21:12,667 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:21:12,669 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:21:12,669 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:21:12,713 INFO ]: Repository-Root is: /tmp [2018-06-22 01:21:12,730 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:21:12,737 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:21:12,738 INFO ]: Initializing SmtParser... [2018-06-22 01:21:12,738 INFO ]: SmtParser initialized [2018-06-22 01:21:12,739 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/004-horn.smt2 [2018-06-22 01:21:12,740 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 01:21:12,833 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/004-horn.smt2 unknown [2018-06-22 01:21:13,009 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/004-horn.smt2 [2018-06-22 01:21:13,014 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:21:13,023 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:21:13,023 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:21:13,023 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:21:13,024 INFO ]: ChcToBoogie initialized [2018-06-22 01:21:13,027 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,094 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13 Unit [2018-06-22 01:21:13,094 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:21:13,095 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:21:13,095 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:21:13,095 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:21:13,115 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,115 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,120 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,120 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,123 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,125 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,126 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... [2018-06-22 01:21:13,127 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:21:13,128 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:21:13,128 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:21:13,128 INFO ]: RCFGBuilder initialized [2018-06-22 01:21:13,128 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 01:21:13,145 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:21:13,145 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:21:13,145 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:21:13,145 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:21:13,145 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:21:13,145 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:21:13,351 INFO ]: Using library mode [2018-06-22 01:21:13,352 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:21:13 BoogieIcfgContainer [2018-06-22 01:21:13,352 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:21:13,353 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:21:13,354 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:21:13,365 INFO ]: TraceAbstraction initialized [2018-06-22 01:21:13,366 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:21:13" (1/3) ... [2018-06-22 01:21:13,366 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806dbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:21:13, skipping insertion in model container [2018-06-22 01:21:13,366 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:21:13" (2/3) ... [2018-06-22 01:21:13,367 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806dbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:21:13, skipping insertion in model container [2018-06-22 01:21:13,367 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:21:13" (3/3) ... [2018-06-22 01:21:13,368 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:21:13,386 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:21:13,404 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:21:13,458 INFO ]: Using default assertion order modulation [2018-06-22 01:21:13,459 INFO ]: Interprodecural is true [2018-06-22 01:21:13,459 INFO ]: Hoare is false [2018-06-22 01:21:13,459 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:21:13,459 INFO ]: Backedges is TWOTRACK [2018-06-22 01:21:13,459 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:21:13,459 INFO ]: Difference is false [2018-06-22 01:21:13,459 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:21:13,459 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:21:13,471 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 01:21:13,479 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 01:21:13,479 INFO ]: Found error trace [2018-06-22 01:21:13,480 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:13,480 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:13,485 INFO ]: Analyzing trace with hash -204663978, now seen corresponding path program 1 times [2018-06-22 01:21:13,486 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:13,487 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:13,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:13,520 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:13,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:13,558 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:13,608 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:13,610 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:21:13,610 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:21:13,611 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:21:13,621 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:21:13,621 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:21:13,623 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 01:21:13,701 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:13,701 INFO ]: Finished difference Result 9 states and 13 transitions. [2018-06-22 01:21:13,702 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:21:13,703 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 01:21:13,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:13,711 INFO ]: With dead ends: 9 [2018-06-22 01:21:13,711 INFO ]: Without dead ends: 9 [2018-06-22 01:21:13,713 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:21:13,731 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 01:21:13,748 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 01:21:13,750 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 01:21:13,750 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-22 01:21:13,751 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-22 01:21:13,751 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:13,751 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-22 01:21:13,752 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:21:13,752 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-22 01:21:13,752 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 01:21:13,752 INFO ]: Found error trace [2018-06-22 01:21:13,752 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:13,753 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:13,753 INFO ]: Analyzing trace with hash -2057099186, now seen corresponding path program 1 times [2018-06-22 01:21:13,753 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:13,753 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:13,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:13,754 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:13,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:13,790 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:14,062 WARN ]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 01:21:14,194 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:14,194 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:14,194 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:14,203 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:14,233 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:14,242 INFO ]: Computing forward predicates... [2018-06-22 01:21:14,449 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:14,473 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:14,473 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 01:21:14,473 INFO ]: Interpolant automaton has 6 states [2018-06-22 01:21:14,473 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 01:21:14,474 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 01:21:14,474 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 6 states. [2018-06-22 01:21:14,689 WARN ]: Spent 194.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-06-22 01:21:14,895 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:14,895 INFO ]: Finished difference Result 10 states and 16 transitions. [2018-06-22 01:21:14,896 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:21:14,896 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 01:21:14,896 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:14,896 INFO ]: With dead ends: 10 [2018-06-22 01:21:14,896 INFO ]: Without dead ends: 10 [2018-06-22 01:21:14,898 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 01:21:14,898 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 01:21:14,899 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 01:21:14,899 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 01:21:14,899 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2018-06-22 01:21:14,899 INFO ]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 8 [2018-06-22 01:21:14,899 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:14,899 INFO ]: Abstraction has 10 states and 16 transitions. [2018-06-22 01:21:14,900 INFO ]: Interpolant automaton has 6 states. [2018-06-22 01:21:14,900 INFO ]: Start isEmpty. Operand 10 states and 16 transitions. [2018-06-22 01:21:14,901 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 01:21:14,901 INFO ]: Found error trace [2018-06-22 01:21:14,901 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:14,901 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:14,901 INFO ]: Analyzing trace with hash -2053405102, now seen corresponding path program 1 times [2018-06-22 01:21:14,902 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:14,902 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:14,902 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:14,902 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:14,902 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:14,928 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:14,984 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:14,984 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:21:14,984 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:21:14,984 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:21:14,985 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:21:14,985 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:21:14,985 INFO ]: Start difference. First operand 10 states and 16 transitions. Second operand 3 states. [2018-06-22 01:21:15,000 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:15,000 INFO ]: Finished difference Result 11 states and 19 transitions. [2018-06-22 01:21:15,001 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:21:15,001 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-22 01:21:15,001 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:15,001 INFO ]: With dead ends: 11 [2018-06-22 01:21:15,001 INFO ]: Without dead ends: 10 [2018-06-22 01:21:15,001 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:21:15,001 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 01:21:15,003 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 01:21:15,003 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 01:21:15,003 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-06-22 01:21:15,003 INFO ]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2018-06-22 01:21:15,003 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:15,003 INFO ]: Abstraction has 10 states and 13 transitions. [2018-06-22 01:21:15,003 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:21:15,003 INFO ]: Start isEmpty. Operand 10 states and 13 transitions. [2018-06-22 01:21:15,004 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 01:21:15,004 INFO ]: Found error trace [2018-06-22 01:21:15,004 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:15,004 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:15,004 INFO ]: Analyzing trace with hash -2048787497, now seen corresponding path program 1 times [2018-06-22 01:21:15,004 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:15,004 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:15,005 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,005 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:15,005 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,015 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:15,159 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:15,159 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:15,159 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:15,168 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:15,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:15,201 INFO ]: Computing forward predicates... [2018-06-22 01:21:15,274 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:15,294 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:15,294 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 01:21:15,294 INFO ]: Interpolant automaton has 6 states [2018-06-22 01:21:15,294 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 01:21:15,294 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 01:21:15,295 INFO ]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-06-22 01:21:15,327 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:15,327 INFO ]: Finished difference Result 12 states and 16 transitions. [2018-06-22 01:21:15,330 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:21:15,330 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 01:21:15,330 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:15,330 INFO ]: With dead ends: 12 [2018-06-22 01:21:15,330 INFO ]: Without dead ends: 12 [2018-06-22 01:21:15,331 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 01:21:15,331 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 01:21:15,333 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 01:21:15,333 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 01:21:15,333 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-06-22 01:21:15,333 INFO ]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2018-06-22 01:21:15,333 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:15,333 INFO ]: Abstraction has 12 states and 16 transitions. [2018-06-22 01:21:15,333 INFO ]: Interpolant automaton has 6 states. [2018-06-22 01:21:15,333 INFO ]: Start isEmpty. Operand 12 states and 16 transitions. [2018-06-22 01:21:15,333 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 01:21:15,333 INFO ]: Found error trace [2018-06-22 01:21:15,334 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:15,334 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:15,334 INFO ]: Analyzing trace with hash 646951510, now seen corresponding path program 2 times [2018-06-22 01:21:15,334 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:15,334 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:15,335 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,335 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:15,335 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,345 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:15,458 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:15,458 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:21:15,458 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:21:15,458 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:21:15,458 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:21:15,458 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:21:15,458 INFO ]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2018-06-22 01:21:15,486 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:15,486 INFO ]: Finished difference Result 13 states and 18 transitions. [2018-06-22 01:21:15,487 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:21:15,487 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 01:21:15,487 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:15,487 INFO ]: With dead ends: 13 [2018-06-22 01:21:15,487 INFO ]: Without dead ends: 12 [2018-06-22 01:21:15,487 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:21:15,488 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 01:21:15,489 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 01:21:15,489 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 01:21:15,489 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-06-22 01:21:15,489 INFO ]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-06-22 01:21:15,489 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:15,489 INFO ]: Abstraction has 12 states and 14 transitions. [2018-06-22 01:21:15,489 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:21:15,489 INFO ]: Start isEmpty. Operand 12 states and 14 transitions. [2018-06-22 01:21:15,490 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 01:21:15,490 INFO ]: Found error trace [2018-06-22 01:21:15,490 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:15,490 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:15,490 INFO ]: Analyzing trace with hash 655263199, now seen corresponding path program 1 times [2018-06-22 01:21:15,490 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:15,490 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:15,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,491 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:15,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:15,506 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:15,746 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-22 01:21:16,074 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-22 01:21:16,075 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:16,075 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:16,075 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:16,084 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:16,104 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:16,106 INFO ]: Computing forward predicates... [2018-06-22 01:21:16,151 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:16,171 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:16,171 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 01:21:16,171 INFO ]: Interpolant automaton has 8 states [2018-06-22 01:21:16,171 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 01:21:16,171 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 01:21:16,172 INFO ]: Start difference. First operand 12 states and 14 transitions. Second operand 8 states. [2018-06-22 01:21:16,250 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:16,250 INFO ]: Finished difference Result 14 states and 16 transitions. [2018-06-22 01:21:16,251 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:21:16,251 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 01:21:16,251 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:16,251 INFO ]: With dead ends: 14 [2018-06-22 01:21:16,251 INFO ]: Without dead ends: 14 [2018-06-22 01:21:16,252 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:21:16,252 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 01:21:16,253 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 01:21:16,253 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 01:21:16,254 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-06-22 01:21:16,254 INFO ]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-06-22 01:21:16,254 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:16,254 INFO ]: Abstraction has 14 states and 16 transitions. [2018-06-22 01:21:16,254 INFO ]: Interpolant automaton has 8 states. [2018-06-22 01:21:16,254 INFO ]: Start isEmpty. Operand 14 states and 16 transitions. [2018-06-22 01:21:16,254 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 01:21:16,254 INFO ]: Found error trace [2018-06-22 01:21:16,254 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:16,254 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:16,254 INFO ]: Analyzing trace with hash -1771561938, now seen corresponding path program 2 times [2018-06-22 01:21:16,255 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:16,255 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:16,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:16,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:16,351 INFO ]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:16,351 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:21:16,351 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:21:16,351 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:21:16,351 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:21:16,351 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:21:16,351 INFO ]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-06-22 01:21:16,390 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:16,390 INFO ]: Finished difference Result 14 states and 15 transitions. [2018-06-22 01:21:16,391 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:21:16,391 INFO ]: Start accepts. Automaton has 4 states. Word has length 10 [2018-06-22 01:21:16,391 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:16,391 INFO ]: With dead ends: 14 [2018-06-22 01:21:16,391 INFO ]: Without dead ends: 12 [2018-06-22 01:21:16,391 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:21:16,391 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 01:21:16,392 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 01:21:16,392 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 01:21:16,393 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 01:21:16,393 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 01:21:16,393 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:16,393 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 01:21:16,393 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:21:16,393 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 01:21:16,393 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 01:21:16,393 INFO ]: Found error trace [2018-06-22 01:21:16,393 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:16,393 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:16,394 INFO ]: Analyzing trace with hash -1625745473, now seen corresponding path program 3 times [2018-06-22 01:21:16,394 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:16,394 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:16,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,394 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:16,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:16,517 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:16,517 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:16,517 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-06-22 01:21:16,531 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:21:16,560 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 01:21:16,560 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:16,563 INFO ]: Computing forward predicates... [2018-06-22 01:21:16,737 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:16,770 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:16,770 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-06-22 01:21:16,771 INFO ]: Interpolant automaton has 7 states [2018-06-22 01:21:16,771 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 01:21:16,771 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:21:16,771 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-06-22 01:21:16,846 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:16,846 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 01:21:16,847 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:21:16,847 INFO ]: Start accepts. Automaton has 7 states. Word has length 11 [2018-06-22 01:21:16,847 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:16,847 INFO ]: With dead ends: 13 [2018-06-22 01:21:16,847 INFO ]: Without dead ends: 13 [2018-06-22 01:21:16,847 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:21:16,848 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 01:21:16,849 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 01:21:16,849 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 01:21:16,849 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 01:21:16,849 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 01:21:16,849 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:16,849 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 01:21:16,849 INFO ]: Interpolant automaton has 7 states. [2018-06-22 01:21:16,849 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 01:21:16,850 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:21:16,850 INFO ]: Found error trace [2018-06-22 01:21:16,850 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:16,850 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:16,850 INFO ]: Analyzing trace with hash 1142326414, now seen corresponding path program 4 times [2018-06-22 01:21:16,850 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:16,850 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:16,851 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,851 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:16,851 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:16,874 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:17,188 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:17,188 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:17,188 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:17,196 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:21:17,230 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:21:17,230 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:17,234 INFO ]: Computing forward predicates... [2018-06-22 01:21:17,344 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:17,373 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:17,373 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 01:21:17,373 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:21:17,373 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:21:17,373 INFO ]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:21:17,374 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 01:21:17,577 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:17,577 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 01:21:17,578 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 01:21:17,578 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 01:21:17,578 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:17,580 INFO ]: With dead ends: 14 [2018-06-22 01:21:17,580 INFO ]: Without dead ends: 14 [2018-06-22 01:21:17,580 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:21:17,580 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 01:21:17,581 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 01:21:17,581 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 01:21:17,582 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 01:21:17,582 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 01:21:17,582 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:17,582 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 01:21:17,582 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:21:17,582 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 01:21:17,582 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:21:17,582 INFO ]: Found error trace [2018-06-22 01:21:17,582 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:17,582 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:17,582 INFO ]: Analyzing trace with hash 1053208991, now seen corresponding path program 5 times [2018-06-22 01:21:17,582 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:17,582 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:17,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:17,583 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:17,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:17,604 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,069 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:18,069 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:18,069 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:18,079 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:21:18,154 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 01:21:18,155 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,158 INFO ]: Computing forward predicates... [2018-06-22 01:21:18,227 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:18,258 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:18,258 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-06-22 01:21:18,259 INFO ]: Interpolant automaton has 9 states [2018-06-22 01:21:18,259 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 01:21:18,259 INFO ]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:21:18,259 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2018-06-22 01:21:18,309 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:18,309 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 01:21:18,310 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 01:21:18,310 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 01:21:18,310 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:18,310 INFO ]: With dead ends: 15 [2018-06-22 01:21:18,310 INFO ]: Without dead ends: 15 [2018-06-22 01:21:18,310 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:21:18,310 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 01:21:18,312 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 01:21:18,312 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 01:21:18,312 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 01:21:18,312 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 01:21:18,312 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:18,312 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 01:21:18,312 INFO ]: Interpolant automaton has 9 states. [2018-06-22 01:21:18,312 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 01:21:18,312 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:21:18,313 INFO ]: Found error trace [2018-06-22 01:21:18,313 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:18,313 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:18,313 INFO ]: Analyzing trace with hash -1709431122, now seen corresponding path program 6 times [2018-06-22 01:21:18,313 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:18,313 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:18,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:18,314 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:18,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:18,333 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,492 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:18,493 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:18,493 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:18,504 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:21:18,550 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 01:21:18,550 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,553 INFO ]: Computing forward predicates... [2018-06-22 01:21:18,572 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:18,591 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:18,591 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-22 01:21:18,591 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:21:18,592 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:21:18,592 INFO ]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:21:18,592 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2018-06-22 01:21:18,643 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:18,643 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 01:21:18,644 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 01:21:18,644 INFO ]: Start accepts. Automaton has 10 states. Word has length 14 [2018-06-22 01:21:18,644 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:18,644 INFO ]: With dead ends: 16 [2018-06-22 01:21:18,644 INFO ]: Without dead ends: 16 [2018-06-22 01:21:18,645 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:21:18,645 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 01:21:18,646 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 01:21:18,646 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 01:21:18,647 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 01:21:18,648 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 01:21:18,648 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:18,648 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 01:21:18,648 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:21:18,648 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 01:21:18,648 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:21:18,648 INFO ]: Found error trace [2018-06-22 01:21:18,648 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:18,648 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:18,649 INFO ]: Analyzing trace with hash -1451928705, now seen corresponding path program 7 times [2018-06-22 01:21:18,649 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:18,649 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:18,649 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:18,649 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:21:18,649 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:18,673 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,868 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:18,868 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:18,868 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:18,874 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:18,920 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:18,925 INFO ]: Computing forward predicates... [2018-06-22 01:21:18,969 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:19,001 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:19,001 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-06-22 01:21:19,001 INFO ]: Interpolant automaton has 11 states [2018-06-22 01:21:19,001 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 01:21:19,001 INFO ]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-06-22 01:21:19,001 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2018-06-22 01:21:19,225 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:19,225 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 01:21:19,227 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:21:19,227 INFO ]: Start accepts. Automaton has 11 states. Word has length 15 [2018-06-22 01:21:19,227 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:19,227 INFO ]: With dead ends: 17 [2018-06-22 01:21:19,227 INFO ]: Without dead ends: 17 [2018-06-22 01:21:19,228 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-06-22 01:21:19,228 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 01:21:19,229 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 01:21:19,229 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 01:21:19,229 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 01:21:19,230 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-22 01:21:19,230 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:19,230 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 01:21:19,230 INFO ]: Interpolant automaton has 11 states. [2018-06-22 01:21:19,230 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 01:21:19,230 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:21:19,230 INFO ]: Found error trace [2018-06-22 01:21:19,230 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:21:19,230 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:21:19,230 INFO ]: Analyzing trace with hash -2059288370, now seen corresponding path program 8 times [2018-06-22 01:21:19,230 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:21:19,230 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:21:19,231 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:19,231 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:21:19,231 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:21:19,252 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:19,519 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 01:21:19,673 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:19,673 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:21:19,673 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-22 01:21:19,685 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:21:19,726 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:21:19,726 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:21:19,730 INFO ]: Computing forward predicates... [2018-06-22 01:21:19,930 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:21:19,948 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:21:19,948 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-22 01:21:19,948 INFO ]: Interpolant automaton has 22 states [2018-06-22 01:21:19,949 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 01:21:19,949 INFO ]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2018-06-22 01:21:19,949 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 22 states. [2018-06-22 01:21:20,337 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:21:20,337 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 01:21:20,338 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 01:21:20,338 INFO ]: Start accepts. Automaton has 22 states. Word has length 16 [2018-06-22 01:21:20,338 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:21:20,338 INFO ]: With dead ends: 14 [2018-06-22 01:21:20,338 INFO ]: Without dead ends: 0 [2018-06-22 01:21:20,338 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2018-06-22 01:21:20,338 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 01:21:20,338 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 01:21:20,338 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 01:21:20,338 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 01:21:20,338 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-06-22 01:21:20,338 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:21:20,338 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 01:21:20,338 INFO ]: Interpolant automaton has 22 states. [2018-06-22 01:21:20,338 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 01:21:20,338 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 01:21:20,342 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:21:20 BoogieIcfgContainer [2018-06-22 01:21:20,342 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:21:20,343 INFO ]: Toolchain (without parser) took 7328.38 ms. Allocated memory was 309.3 MB in the beginning and 360.2 MB in the end (delta: 50.9 MB). Free memory was 265.7 MB in the beginning and 199.8 MB in the end (delta: 65.9 MB). Peak memory consumption was 116.8 MB. Max. memory is 3.6 GB. [2018-06-22 01:21:20,344 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:21:20,344 INFO ]: ChcToBoogie took 71.01 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:21:20,344 INFO ]: Boogie Preprocessor took 32.06 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:21:20,345 INFO ]: RCFGBuilder took 224.44 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:21:20,345 INFO ]: TraceAbstraction took 6988.64 ms. Allocated memory was 309.3 MB in the beginning and 360.2 MB in the end (delta: 50.9 MB). Free memory was 253.8 MB in the beginning and 199.8 MB in the end (delta: 53.9 MB). Peak memory consumption was 104.8 MB. Max. memory is 3.6 GB. [2018-06-22 01:21:20,348 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 71.01 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.06 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 224.44 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 253.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6988.64 ms. Allocated memory was 309.3 MB in the beginning and 360.2 MB in the end (delta: 50.9 MB). Free memory was 253.8 MB in the beginning and 199.8 MB in the end (delta: 53.9 MB). Peak memory consumption was 104.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 6.8s OverallTime, 13 OverallIterations, 8 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 4 SDslu, 306 SDs, 0 SdLazy, 583 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=12, 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: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 246 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 224 ConstructedInterpolants, 0 QuantifiedInterpolants, 24389 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1450 ConjunctsInSsa, 708 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 10/330 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/004-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-21-20-357.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/004-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-21-20-357.csv Received shutdown request...