java -Xmx8000000000 -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-comp18-benchmarks/lia/chc-lia-0113.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3d12b04 [2018-06-19 23:09:42,598 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-19 23:09:42,600 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-19 23:09:42,616 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-19 23:09:42,616 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-19 23:09:42,617 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-19 23:09:42,619 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-19 23:09:42,627 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-19 23:09:42,630 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-19 23:09:42,631 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-19 23:09:42,632 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-19 23:09:42,632 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-19 23:09:42,633 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-19 23:09:42,636 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-19 23:09:42,637 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-19 23:09:42,638 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-19 23:09:42,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-19 23:09:42,650 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-19 23:09:42,651 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-19 23:09:42,652 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-19 23:09:42,656 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-19 23:09:42,658 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-19 23:09:42,658 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-19 23:09:42,658 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-19 23:09:42,660 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-19 23:09:42,661 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-19 23:09:42,662 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-19 23:09:42,663 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-19 23:09:42,664 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-19 23:09:42,664 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-19 23:09:42,664 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-19 23:09:42,670 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-19 23:09:42,670 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-19 23:09:42,671 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-19 23:09:42,672 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-19 23:09:42,672 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-19 23:09:42,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-19 23:09:42,693 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-19 23:09:42,693 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-19 23:09:42,694 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-19 23:09:42,695 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-19 23:09:42,696 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-19 23:09:42,696 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-19 23:09:42,696 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-19 23:09:42,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-19 23:09:42,696 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-19 23:09:42,697 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-19 23:09:42,698 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-19 23:09:42,700 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-19 23:09:42,700 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-19 23:09:42,751 INFO ]: Repository-Root is: /tmp [2018-06-19 23:09:42,769 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-19 23:09:42,775 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-19 23:09:42,776 INFO ]: Initializing SmtParser... [2018-06-19 23:09:42,776 INFO ]: SmtParser initialized [2018-06-19 23:09:42,777 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp18-benchmarks/lia/chc-lia-0113.smt2 [2018-06-19 23:09:42,778 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 [2018-06-19 23:09:42,869 INFO ]: Executing SMT file /storage/chc-comp18-benchmarks/lia/chc-lia-0113.smt2 unknown [2018-06-19 23:09:43,078 INFO ]: Succesfully executed SMT file /storage/chc-comp18-benchmarks/lia/chc-lia-0113.smt2 [2018-06-19 23:09:43,083 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-19 23:09:43,090 INFO ]: Walking toolchain with 4 elements. [2018-06-19 23:09:43,090 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-19 23:09:43,090 INFO ]: Initializing ChcToBoogie... [2018-06-19 23:09:43,091 INFO ]: ChcToBoogie initialized [2018-06-19 23:09:43,094 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,208 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43 Unit [2018-06-19 23:09:43,208 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-19 23:09:43,209 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-19 23:09:43,209 INFO ]: Initializing Boogie Preprocessor... [2018-06-19 23:09:43,209 INFO ]: Boogie Preprocessor initialized [2018-06-19 23:09:43,231 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,231 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,255 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,256 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,261 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,271 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,280 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (1/1) ... [2018-06-19 23:09:43,283 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-19 23:09:43,284 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-19 23:09:43,284 INFO ]: Initializing RCFGBuilder... [2018-06-19 23:09:43,284 INFO ]: RCFGBuilder initialized [2018-06-19 23:09:43,285 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (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) [2018-06-19 23:09:43,312 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-19 23:09:43,312 INFO ]: Found specification of procedure gotoProc [2018-06-19 23:09:43,313 INFO ]: Found implementation of procedure gotoProc [2018-06-19 23:09:43,313 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-19 23:09:43,313 INFO ]: Found specification of procedure Ultimate.START [2018-06-19 23:09:43,313 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 [2018-06-19 23:09:43,622 INFO ]: Using library mode [2018-06-19 23:09:43,623 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.06 11:09:43 BoogieIcfgContainer [2018-06-19 23:09:43,623 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-19 23:09:43,624 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-19 23:09:43,624 INFO ]: Initializing TraceAbstraction... [2018-06-19 23:09:43,628 INFO ]: TraceAbstraction initialized [2018-06-19 23:09:43,628 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 19.06 11:09:43" (1/3) ... [2018-06-19 23:09:43,629 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c99d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 19.06 11:09:43, skipping insertion in model container [2018-06-19 23:09:43,629 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 19.06 11:09:43" (2/3) ... [2018-06-19 23:09:43,629 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c99d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.06 11:09:43, skipping insertion in model container [2018-06-19 23:09:43,629 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.06 11:09:43" (3/3) ... [2018-06-19 23:09:43,640 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-19 23:09:43,659 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-19 23:09:43,672 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-19 23:09:43,745 INFO ]: Using default assertion order modulation [2018-06-19 23:09:43,746 INFO ]: Interprodecural is true [2018-06-19 23:09:43,746 INFO ]: Hoare is false [2018-06-19 23:09:43,746 INFO ]: Compute interpolants for FPandBP [2018-06-19 23:09:43,746 INFO ]: Backedges is TWOTRACK [2018-06-19 23:09:43,746 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-19 23:09:43,746 INFO ]: Difference is false [2018-06-19 23:09:43,746 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-19 23:09:43,746 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-19 23:09:43,767 INFO ]: Start isEmpty. Operand 10 states. [2018-06-19 23:09:43,782 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-19 23:09:43,782 INFO ]: Found error trace [2018-06-19 23:09:43,783 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-19 23:09:43,783 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-19 23:09:43,791 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-19 23:09:43,793 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-19 23:09:43,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-19 23:09:43,838 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:43,838 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-19 23:09:43,838 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:43,889 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:43,983 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:43,985 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-19 23:09:43,985 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-19 23:09:43,987 INFO ]: Interpolant automaton has 3 states [2018-06-19 23:09:43,999 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-19 23:09:44,000 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-19 23:09:44,002 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-19 23:09:44,075 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-19 23:09:44,075 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-19 23:09:44,076 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-19 23:09:44,077 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-19 23:09:44,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-19 23:09:44,085 INFO ]: With dead ends: 9 [2018-06-19 23:09:44,085 INFO ]: Without dead ends: 9 [2018-06-19 23:09:44,089 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 [2018-06-19 23:09:44,103 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-19 23:09:44,122 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-19 23:09:44,125 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-19 23:09:44,125 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-19 23:09:44,126 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-19 23:09:44,126 INFO ]: Finished accepts. word is rejected. [2018-06-19 23:09:44,126 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-19 23:09:44,126 INFO ]: Interpolant automaton has 3 states. [2018-06-19 23:09:44,126 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-19 23:09:44,126 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-19 23:09:44,127 INFO ]: Found error trace [2018-06-19 23:09:44,127 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-19 23:09:44,127 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-19 23:09:44,127 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-19 23:09:44,127 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-19 23:09:44,127 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-19 23:09:44,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:44,128 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-19 23:09:44,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:44,163 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:44,314 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:44,314 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-19 23:09:44,314 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 [2018-06-19 23:09:44,324 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-19 23:09:44,397 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:44,410 INFO ]: Computing forward predicates... [2018-06-19 23:09:46,321 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:46,355 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-19 23:09:46,355 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-19 23:09:46,355 INFO ]: Interpolant automaton has 5 states [2018-06-19 23:09:46,356 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-19 23:09:46,356 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-19 23:09:46,356 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-19 23:09:46,439 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-19 23:09:46,440 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-19 23:09:46,440 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-19 23:09:46,440 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-19 23:09:46,440 INFO ]: Finished accepts. some prefix is accepted. [2018-06-19 23:09:46,440 INFO ]: With dead ends: 10 [2018-06-19 23:09:46,440 INFO ]: Without dead ends: 10 [2018-06-19 23:09:46,441 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-19 23:09:46,441 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-19 23:09:46,442 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-19 23:09:46,442 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-19 23:09:46,443 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-19 23:09:46,443 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-19 23:09:46,443 INFO ]: Finished accepts. word is rejected. [2018-06-19 23:09:46,443 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-19 23:09:46,443 INFO ]: Interpolant automaton has 5 states. [2018-06-19 23:09:46,443 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-19 23:09:46,443 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-19 23:09:46,443 INFO ]: Found error trace [2018-06-19 23:09:46,443 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-19 23:09:46,444 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-19 23:09:46,444 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-19 23:09:46,444 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-19 23:09:46,444 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-19 23:09:46,445 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:46,445 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-19 23:09:46,445 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:46,515 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:46,668 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:46,669 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-19 23:09:46,669 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 [2018-06-19 23:09:46,675 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-19 23:09:46,723 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-19 23:09:46,723 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:46,726 INFO ]: Computing forward predicates... [2018-06-19 23:09:51,291 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:51,315 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-19 23:09:51,315 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-19 23:09:51,315 INFO ]: Interpolant automaton has 6 states [2018-06-19 23:09:51,315 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-19 23:09:51,316 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-19 23:09:51,316 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-19 23:09:51,389 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-19 23:09:51,390 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-19 23:09:51,391 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-19 23:09:51,391 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-19 23:09:51,391 INFO ]: Finished accepts. some prefix is accepted. [2018-06-19 23:09:51,391 INFO ]: With dead ends: 11 [2018-06-19 23:09:51,391 INFO ]: Without dead ends: 11 [2018-06-19 23:09:51,392 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-06-19 23:09:51,392 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-19 23:09:51,393 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-19 23:09:51,393 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-19 23:09:51,393 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-19 23:09:51,393 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-19 23:09:51,393 INFO ]: Finished accepts. word is rejected. [2018-06-19 23:09:51,393 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-19 23:09:51,393 INFO ]: Interpolant automaton has 6 states. [2018-06-19 23:09:51,393 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-19 23:09:51,394 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-19 23:09:51,394 INFO ]: Found error trace [2018-06-19 23:09:51,394 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-19 23:09:51,394 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-19 23:09:51,394 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-19 23:09:51,394 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-19 23:09:51,394 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-19 23:09:51,395 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:51,395 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-19 23:09:51,395 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-19 23:09:51,464 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:51,628 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-19 23:09:51,628 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-19 23:09:51,628 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 [2018-06-19 23:09:51,636 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-19 23:09:51,676 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-19 23:09:51,676 INFO ]: Conjunction of SSA is unsat [2018-06-19 23:09:51,678 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown