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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e6_236.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:23:24,636 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:23:24,638 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:23:24,652 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:23:24,652 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:23:24,653 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:23:24,654 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:23:24,661 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:23:24,663 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:23:24,664 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:23:24,665 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:23:24,665 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:23:24,666 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:23:24,675 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:23:24,676 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:23:24,676 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:23:24,678 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:23:24,679 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:23:24,683 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:23:24,684 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:23:24,685 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:23:24,689 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:23:24,689 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:23:24,690 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:23:24,690 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:23:24,691 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:23:24,692 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:23:24,695 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:23:24,696 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:23:24,696 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:23:24,697 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:23:24,698 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:23:24,701 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:23:24,702 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:23:24,702 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:23:24,702 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 19:23:24,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:23:24,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:23:24,723 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:23:24,723 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:23:24,724 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:23:24,724 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:23:24,724 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:23:24,725 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:23:24,725 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:23:24,725 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:23:24,725 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:23:24,725 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:23:24,725 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:23:24,726 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:23:24,730 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:23:24,731 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:23:24,778 INFO ]: Repository-Root is: /tmp [2018-06-22 19:23:24,793 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:23:24,799 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:23:24,800 INFO ]: Initializing SmtParser... [2018-06-22 19:23:24,801 INFO ]: SmtParser initialized [2018-06-22 19:23:24,801 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e6_236.smt2 [2018-06-22 19:23:24,803 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 19:23:24,886 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e6_236.smt2 unknown [2018-06-22 19:23:25,339 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e2_968_e6_236.smt2 [2018-06-22 19:23:25,344 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:23:25,350 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:23:25,351 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:23:25,351 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:23:25,351 INFO ]: ChcToBoogie initialized [2018-06-22 19:23:25,354 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,426 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25 Unit [2018-06-22 19:23:25,426 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:23:25,428 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:23:25,428 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:23:25,428 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:23:25,455 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,456 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,476 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,477 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,482 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,483 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,490 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (1/1) ... [2018-06-22 19:23:25,493 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:23:25,504 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:23:25,504 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:23:25,504 INFO ]: RCFGBuilder initialized [2018-06-22 19:23:25,505 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:23:25,529 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:23:25,529 INFO ]: Found specification of procedure False [2018-06-22 19:23:25,529 INFO ]: Found implementation of procedure False [2018-06-22 19:23:25,529 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:23:25,529 INFO ]: Found specification of procedure state [2018-06-22 19:23:25,529 INFO ]: Found implementation of procedure state [2018-06-22 19:23:25,529 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:23:25,529 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:23:25,529 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 19:23:25,936 INFO ]: Using library mode [2018-06-22 19:23:25,937 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:23:25 BoogieIcfgContainer [2018-06-22 19:23:25,937 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:23:25,939 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:23:25,939 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:23:25,942 INFO ]: TraceAbstraction initialized [2018-06-22 19:23:25,942 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:23:25" (1/3) ... [2018-06-22 19:23:25,943 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7909b629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:23:25, skipping insertion in model container [2018-06-22 19:23:25,943 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:23:25" (2/3) ... [2018-06-22 19:23:25,943 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7909b629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:23:25, skipping insertion in model container [2018-06-22 19:23:25,943 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:23:25" (3/3) ... [2018-06-22 19:23:25,945 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:23:25,955 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:23:25,963 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:23:26,014 INFO ]: Using default assertion order modulation [2018-06-22 19:23:26,015 INFO ]: Interprodecural is true [2018-06-22 19:23:26,015 INFO ]: Hoare is false [2018-06-22 19:23:26,015 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:23:26,015 INFO ]: Backedges is TWOTRACK [2018-06-22 19:23:26,015 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:23:26,015 INFO ]: Difference is false [2018-06-22 19:23:26,015 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:23:26,015 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:23:26,030 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:23:26,039 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:23:26,040 INFO ]: Found error trace [2018-06-22 19:23:26,040 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:26,041 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:26,046 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:23:26,047 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:26,048 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:26,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:26,087 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:23:26,087 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:26,182 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:26,368 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:23:26,370 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:23:26,370 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:23:26,371 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:23:26,381 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:23:26,382 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:23:26,383 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:23:26,501 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:26,501 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:23:26,502 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:23:26,503 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:23:26,503 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:26,514 INFO ]: With dead ends: 13 [2018-06-22 19:23:26,514 INFO ]: Without dead ends: 13 [2018-06-22 19:23:26,518 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:23:26,535 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:23:26,571 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:23:26,572 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:23:26,573 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:23:26,574 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:23:26,574 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:26,574 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:23:26,574 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:23:26,574 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:23:26,576 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:23:26,576 INFO ]: Found error trace [2018-06-22 19:23:26,576 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:26,576 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:26,577 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:23:26,577 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:26,577 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:26,577 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:26,578 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:23:26,578 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:26,686 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:27,681 WARN ]: Spent 706.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-06-22 19:23:27,708 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:23:27,708 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:27,708 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 19:23:27,719 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:23:27,832 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:27,842 INFO ]: Computing forward predicates... [2018-06-22 19:23:28,269 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:23:28,485 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:23:28,506 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:28,506 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:23:28,507 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:23:28,507 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:23:28,507 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:23:28,507 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:23:29,133 WARN ]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-06-22 19:23:29,323 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:29,324 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:23:29,325 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:23:29,326 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:23:29,326 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:29,326 INFO ]: With dead ends: 15 [2018-06-22 19:23:29,326 INFO ]: Without dead ends: 15 [2018-06-22 19:23:29,327 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:23:29,327 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:23:29,330 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:23:29,331 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:23:29,332 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:23:29,332 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:23:29,332 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:29,332 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:23:29,332 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:23:29,332 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:23:29,333 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:23:29,333 INFO ]: Found error trace [2018-06-22 19:23:29,333 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:29,333 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:29,333 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:23:29,333 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:29,333 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:29,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:29,334 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:23:29,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:29,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:29,923 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2018-06-22 19:23:30,015 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:23:30,015 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:30,015 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 19:23:30,024 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:23:30,141 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:23:30,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:30,147 INFO ]: Computing forward predicates... [2018-06-22 19:23:30,506 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:23:30,540 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:30,540 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:23:30,540 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:23:30,540 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:23:30,540 INFO ]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:23:30,541 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:23:30,748 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2018-06-22 19:23:30,971 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2018-06-22 19:23:31,106 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2018-06-22 19:23:31,153 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:31,153 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:23:31,154 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:23:31,154 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:23:31,154 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:31,155 INFO ]: With dead ends: 17 [2018-06-22 19:23:31,155 INFO ]: Without dead ends: 17 [2018-06-22 19:23:31,155 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:23:31,155 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:23:31,162 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:23:31,162 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:23:31,163 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:23:31,163 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:23:31,163 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:31,163 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:23:31,163 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:23:31,163 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:23:31,164 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:23:31,164 INFO ]: Found error trace [2018-06-22 19:23:31,164 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:31,164 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:31,164 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:23:31,164 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:31,164 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:31,165 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:31,165 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:23:31,165 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:31,256 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:31,742 WARN ]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 19:23:31,987 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2018-06-22 19:23:32,195 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-06-22 19:23:32,283 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:23:32,283 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:32,283 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) [2018-06-22 19:23:32,298 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:23:32,447 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:23:32,447 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:32,453 INFO ]: Computing forward predicates... [2018-06-22 19:23:32,759 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:23:32,781 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:32,781 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:23:32,782 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:23:32,782 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:23:32,782 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:23:32,782 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:23:33,029 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2018-06-22 19:23:33,347 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2018-06-22 19:23:33,503 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2018-06-22 19:23:33,642 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:33,643 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:23:33,643 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:23:33,644 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:23:33,644 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:33,644 INFO ]: With dead ends: 19 [2018-06-22 19:23:33,644 INFO ]: Without dead ends: 19 [2018-06-22 19:23:33,644 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:23:33,644 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:23:33,647 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:23:33,647 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:23:33,648 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:23:33,648 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:23:33,648 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:33,648 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:23:33,648 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:23:33,648 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:23:33,649 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:23:33,649 INFO ]: Found error trace [2018-06-22 19:23:33,649 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:33,649 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:33,649 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:23:33,649 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:33,649 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:33,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:33,650 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:23:33,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:33,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:34,488 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-06-22 19:23:34,896 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 26 [2018-06-22 19:23:35,324 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2018-06-22 19:23:35,459 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-06-22 19:23:35,789 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 15 [2018-06-22 19:23:35,980 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 17 [2018-06-22 19:23:35,994 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:23:35,995 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:35,995 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:23:36,004 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:23:36,197 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:23:36,198 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:36,206 INFO ]: Computing forward predicates... [2018-06-22 19:23:36,680 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:23:36,701 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:36,701 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:23:36,701 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:23:36,701 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:23:36,702 INFO ]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:23:36,702 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:23:36,862 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-06-22 19:23:37,086 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2018-06-22 19:23:37,223 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2018-06-22 19:23:37,365 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-06-22 19:23:37,573 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2018-06-22 19:23:37,604 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:37,605 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:23:37,605 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:23:37,605 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:23:37,605 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:37,606 INFO ]: With dead ends: 21 [2018-06-22 19:23:37,606 INFO ]: Without dead ends: 21 [2018-06-22 19:23:37,606 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:23:37,606 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:23:37,609 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:23:37,609 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:23:37,610 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:23:37,610 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:23:37,610 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:37,610 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:23:37,610 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:23:37,610 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:23:37,611 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:23:37,611 INFO ]: Found error trace [2018-06-22 19:23:37,611 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:37,611 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:37,611 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:23:37,611 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:37,611 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:37,612 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:37,612 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:23:37,612 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:37,769 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:43,290 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-06-22 19:23:44,336 WARN ]: Spent 926.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 27 [2018-06-22 19:23:44,814 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2018-06-22 19:23:45,094 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 25 [2018-06-22 19:23:46,184 WARN ]: Spent 902.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 26 [2018-06-22 19:23:47,314 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 414 DAG size of output: 24 [2018-06-22 19:23:48,517 WARN ]: Spent 991.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 15 [2018-06-22 19:23:48,537 INFO ]: Checked inductivity of 55 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-22 19:23:48,537 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:23:48,537 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 19:23:48,545 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:23:48,778 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:23:48,778 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:23:48,787 INFO ]: Computing forward predicates... [2018-06-22 19:23:49,149 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:23:49,169 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:23:49,169 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2018-06-22 19:23:49,169 INFO ]: Interpolant automaton has 22 states [2018-06-22 19:23:49,169 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 19:23:49,170 INFO ]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:23:49,170 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 19:23:49,416 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2018-06-22 19:23:49,637 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2018-06-22 19:23:49,897 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2018-06-22 19:23:50,279 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2018-06-22 19:23:50,467 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2018-06-22 19:23:50,665 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2018-06-22 19:23:50,713 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:23:50,713 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:23:50,713 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:23:50,713 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 19:23:50,713 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:23:50,714 INFO ]: With dead ends: 23 [2018-06-22 19:23:50,714 INFO ]: Without dead ends: 23 [2018-06-22 19:23:50,714 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2018-06-22 19:23:50,714 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:23:50,719 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:23:50,719 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:23:50,719 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:23:50,720 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:23:50,720 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:23:50,720 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:23:50,720 INFO ]: Interpolant automaton has 22 states. [2018-06-22 19:23:50,720 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:23:50,721 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:23:50,721 INFO ]: Found error trace [2018-06-22 19:23:50,721 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:23:50,721 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:23:50,721 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:23:50,721 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:23:50,721 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:23:50,721 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:50,721 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:23:50,721 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:23:51,207 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown