java -Xss4m -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/vmt-chc-benchmarks/ctigar/svd.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:39:04,471 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:39:04,474 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:39:04,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:39:04,488 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:39:04,488 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:39:04,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:39:04,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:39:04,501 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:39:04,503 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:39:04,504 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:39:04,504 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:39:04,505 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:39:04,508 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:39:04,509 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:39:04,510 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:39:04,523 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:39:04,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:39:04,526 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:39:04,527 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:39:04,528 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:39:04,530 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:39:04,535 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:39:04,535 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:39:04,536 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:39:04,537 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:39:04,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:39:04,538 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:39:04,541 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:39:04,542 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:39:04,542 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:39:04,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:39:04,550 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:39:04,551 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:39:04,551 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:39:04,552 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:39:04,580 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:39:04,580 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:39:04,581 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:39:04,581 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:39:04,582 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:39:04,582 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:39:04,582 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:39:04,583 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:39:04,584 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:39:04,584 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:39:04,584 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:39:04,585 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:39:04,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:39:04,585 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:39:04,585 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:39:04,585 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:39:04,586 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:39:04,586 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:39:04,586 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:39:04,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:39:04,586 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:39:04,588 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:39:04,589 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:39:04,633 INFO ]: Repository-Root is: /tmp [2018-06-25 13:39:04,654 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:39:04,660 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:39:04,662 INFO ]: Initializing SmtParser... [2018-06-25 13:39:04,662 INFO ]: SmtParser initialized [2018-06-25 13:39:04,662 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd.c.smt2 [2018-06-25 13:39:04,664 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 [2018-06-25 13:39:04,753 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd.c.smt2 unknown [2018-06-25 13:39:05,941 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd.c.smt2 [2018-06-25 13:39:05,947 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:39:05,954 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:39:05,955 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:39:05,955 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:39:05,955 INFO ]: ChcToBoogie initialized [2018-06-25 13:39:05,958 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:39:05" (1/1) ... [2018-06-25 13:39:06,032 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06 Unit [2018-06-25 13:39:06,032 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:39:06,032 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:39:06,032 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:39:06,032 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:39:06,054 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,054 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,083 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,083 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,120 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,122 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,133 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (1/1) ... [2018-06-25 13:39:06,139 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:39:06,139 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:39:06,139 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:39:06,139 INFO ]: RCFGBuilder initialized [2018-06-25 13:39:06,144 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (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) [2018-06-25 13:39:06,154 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:39:06,154 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:39:06,154 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:39:06,154 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:39:06,154 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:39:06,154 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 [2018-06-25 13:39:06,949 INFO ]: Using library mode [2018-06-25 13:39:06,950 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:39:06 BoogieIcfgContainer [2018-06-25 13:39:06,950 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:39:06,951 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:39:06,951 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:39:06,954 INFO ]: TraceAbstraction initialized [2018-06-25 13:39:06,954 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:39:05" (1/3) ... [2018-06-25 13:39:06,955 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad4b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:39:06, skipping insertion in model container [2018-06-25 13:39:06,955 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:39:06" (2/3) ... [2018-06-25 13:39:06,955 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ad4b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:39:06, skipping insertion in model container [2018-06-25 13:39:06,955 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:39:06" (3/3) ... [2018-06-25 13:39:06,958 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:39:06,967 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:39:06,975 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:39:07,025 INFO ]: Using default assertion order modulation [2018-06-25 13:39:07,026 INFO ]: Interprodecural is true [2018-06-25 13:39:07,026 INFO ]: Hoare is false [2018-06-25 13:39:07,026 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:39:07,026 INFO ]: Backedges is TWOTRACK [2018-06-25 13:39:07,026 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:39:07,026 INFO ]: Difference is false [2018-06-25 13:39:07,026 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:39:07,026 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:39:07,039 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:39:07,052 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:39:07,052 INFO ]: Found error trace [2018-06-25 13:39:07,053 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:39:07,053 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:39:07,058 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:39:07,061 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:39:07,061 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:39:07,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:07,107 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:39:07,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:07,206 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:07,448 WARN ]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:39:07,450 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:39:07,451 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:39:07,451 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:39:07,453 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:39:07,464 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:39:07,464 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:39:07,466 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:39:07,604 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:39:07,604 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:39:07,606 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:39:07,608 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:39:07,609 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:39:07,620 INFO ]: With dead ends: 9 [2018-06-25 13:39:07,620 INFO ]: Without dead ends: 9 [2018-06-25 13:39:07,622 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:39:07,641 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:39:07,662 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:39:07,663 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:39:07,663 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:39:07,665 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:39:07,665 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:39:07,665 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:39:07,665 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:39:07,665 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:39:07,665 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:39:07,665 INFO ]: Found error trace [2018-06-25 13:39:07,665 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:39:07,665 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:39:07,665 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:39:07,665 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:39:07,666 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:39:07,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:07,666 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:39:07,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:07,910 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:08,391 WARN ]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 13:39:08,679 WARN ]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 13:39:08,680 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:39:08,680 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:39:08,680 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) [2018-06-25 13:39:08,697 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:39:08,999 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:09,015 INFO ]: Computing forward predicates... [2018-06-25 13:39:11,051 WARN ]: Spent 918.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2018-06-25 13:39:17,631 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:39:17,666 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:39:17,666 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:39:17,666 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:39:17,666 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:39:17,666 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:39:17,667 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:39:17,846 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-06-25 13:39:17,978 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:39:17,978 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:39:17,979 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:39:17,979 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:39:17,979 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:39:17,979 INFO ]: With dead ends: 10 [2018-06-25 13:39:17,979 INFO ]: Without dead ends: 10 [2018-06-25 13:39:17,980 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:39:17,980 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:39:17,980 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:39:17,980 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:39:17,981 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:39:17,981 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:39:17,981 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:39:17,981 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:39:17,981 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:39:17,981 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:39:17,981 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:39:17,981 INFO ]: Found error trace [2018-06-25 13:39:17,981 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:39:17,981 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:39:17,981 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:39:17,981 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:39:17,982 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:39:17,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:17,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:39:17,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:18,306 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:18,840 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:39:18,840 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:39:18,840 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 [2018-06-25 13:39:18,846 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:39:19,124 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:39:19,124 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:19,133 INFO ]: Computing forward predicates... [2018-06-25 13:39:20,758 WARN ]: Spent 487.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2018-06-25 13:39:58,517 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:39:58,548 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:39:58,548 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:39:58,548 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:39:58,548 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:39:58,548 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:39:58,548 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:39:58,749 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2018-06-25 13:39:58,906 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:39:58,906 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:39:58,906 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:39:58,906 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:39:58,906 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:39:58,906 INFO ]: With dead ends: 11 [2018-06-25 13:39:58,906 INFO ]: Without dead ends: 11 [2018-06-25 13:39:58,907 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:39:58,907 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:39:58,908 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:39:58,908 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:39:58,908 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:39:58,908 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:39:58,908 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:39:58,908 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:39:58,908 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:39:58,908 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:39:58,909 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:39:58,909 INFO ]: Found error trace [2018-06-25 13:39:58,909 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:39:58,909 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:39:58,909 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:39:58,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:39:58,909 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:39:58,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:58,910 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:39:58,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:39:59,187 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:39:59,959 WARN ]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-25 13:40:00,017 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:40:00,017 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:40:00,017 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 [2018-06-25 13:40:00,024 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:40:00,380 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:40:00,380 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:40:00,391 INFO ]: Computing forward predicates... [2018-06-25 13:40:01,070 WARN ]: Spent 424.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2018-06-25 13:40:03,374 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown