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/speed2_e8_449.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:53:59,646 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:53:59,647 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:53:59,661 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:53:59,662 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:53:59,662 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:53:59,664 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:53:59,665 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:53:59,667 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:53:59,667 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:53:59,668 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:53:59,669 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:53:59,669 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:53:59,670 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:53:59,671 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:53:59,671 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:53:59,673 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:53:59,675 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:53:59,676 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:53:59,677 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:53:59,678 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:53:59,681 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:53:59,681 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:53:59,681 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:53:59,682 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:53:59,683 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:53:59,683 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:53:59,684 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:53:59,685 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:53:59,685 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:53:59,686 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:53:59,687 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:53:59,687 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:53:59,688 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:53:59,688 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:53:59,689 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 19:53:59,706 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:53:59,706 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:53:59,707 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:53:59,707 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:53:59,708 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:53:59,708 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:53:59,708 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:53:59,708 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:53:59,708 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:53:59,709 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:53:59,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:53:59,709 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:53:59,709 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:53:59,709 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:53:59,710 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:53:59,710 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:53:59,710 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:53:59,710 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:53:59,710 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:53:59,713 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:53:59,713 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:53:59,753 INFO ]: Repository-Root is: /tmp [2018-06-22 19:53:59,768 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:53:59,771 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:53:59,773 INFO ]: Initializing SmtParser... [2018-06-22 19:53:59,773 INFO ]: SmtParser initialized [2018-06-22 19:53:59,773 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449.smt2 [2018-06-22 19:53:59,774 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 19:53:59,864 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449.smt2 unknown [2018-06-22 19:54:00,207 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449.smt2 [2018-06-22 19:54:00,213 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:54:00,219 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:54:00,219 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:54:00,219 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:54:00,219 INFO ]: ChcToBoogie initialized [2018-06-22 19:54:00,222 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,276 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00 Unit [2018-06-22 19:54:00,276 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:54:00,277 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:54:00,277 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:54:00,277 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:54:00,299 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,299 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,309 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,309 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,320 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,321 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,322 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... [2018-06-22 19:54:00,324 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:54:00,324 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:54:00,325 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:54:00,325 INFO ]: RCFGBuilder initialized [2018-06-22 19:54:00,325 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 19:54:00,350 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:54:00,350 INFO ]: Found specification of procedure False [2018-06-22 19:54:00,350 INFO ]: Found implementation of procedure False [2018-06-22 19:54:00,350 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:54:00,350 INFO ]: Found specification of procedure state [2018-06-22 19:54:00,350 INFO ]: Found implementation of procedure state [2018-06-22 19:54:00,350 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:54:00,350 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:54:00,350 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:54:00,668 INFO ]: Using library mode [2018-06-22 19:54:00,669 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:54:00 BoogieIcfgContainer [2018-06-22 19:54:00,669 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:54:00,671 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:54:00,671 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:54:00,674 INFO ]: TraceAbstraction initialized [2018-06-22 19:54:00,674 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:54:00" (1/3) ... [2018-06-22 19:54:00,675 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f05f73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:54:00, skipping insertion in model container [2018-06-22 19:54:00,675 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:54:00" (2/3) ... [2018-06-22 19:54:00,675 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f05f73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:54:00, skipping insertion in model container [2018-06-22 19:54:00,675 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:54:00" (3/3) ... [2018-06-22 19:54:00,677 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:54:00,686 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:54:00,696 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:54:00,735 INFO ]: Using default assertion order modulation [2018-06-22 19:54:00,735 INFO ]: Interprodecural is true [2018-06-22 19:54:00,735 INFO ]: Hoare is false [2018-06-22 19:54:00,735 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:54:00,735 INFO ]: Backedges is TWOTRACK [2018-06-22 19:54:00,735 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:54:00,735 INFO ]: Difference is false [2018-06-22 19:54:00,735 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:54:00,735 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:54:00,749 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:54:00,758 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:54:00,759 INFO ]: Found error trace [2018-06-22 19:54:00,759 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:54:00,759 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:54:00,763 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:54:00,764 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:54:00,764 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:54:00,797 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:00,797 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:54:00,797 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:00,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:00,983 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:54:00,986 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:54:00,986 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:54:00,987 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:54:00,997 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:54:00,997 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:54:00,999 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:54:01,075 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:54:01,075 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:54:01,075 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:54:01,076 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:54:01,077 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:54:01,086 INFO ]: With dead ends: 13 [2018-06-22 19:54:01,086 INFO ]: Without dead ends: 13 [2018-06-22 19:54:01,088 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 19:54:01,100 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:54:01,123 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:54:01,124 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:54:01,125 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:54:01,126 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:54:01,126 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:54:01,126 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:54:01,126 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:54:01,126 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:54:01,127 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:54:01,128 INFO ]: Found error trace [2018-06-22 19:54:01,128 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:54:01,128 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:54:01,128 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:54:01,128 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:54:01,128 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:54:01,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:01,129 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:54:01,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:01,182 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:01,359 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:54:01,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:54:01,359 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 19:54:01,370 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:54:01,448 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:01,458 INFO ]: Computing forward predicates... [2018-06-22 19:54:01,878 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-22 19:54:01,951 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:54:01,972 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:54:01,972 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:54:01,972 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:54:01,972 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:54:01,973 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:54:01,973 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:54:02,182 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 19:54:02,217 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:54:02,217 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:54:02,218 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:54:02,218 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:54:02,219 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:54:02,219 INFO ]: With dead ends: 15 [2018-06-22 19:54:02,219 INFO ]: Without dead ends: 15 [2018-06-22 19:54:02,220 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 19:54:02,220 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:54:02,223 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:54:02,224 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:54:02,224 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:54:02,224 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:54:02,224 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:54:02,224 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:54:02,224 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:54:02,225 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:54:02,226 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:54:02,226 INFO ]: Found error trace [2018-06-22 19:54:02,226 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:54:02,226 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:54:02,226 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:54:02,226 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:54:02,226 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:54:02,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:02,227 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:54:02,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:02,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:02,805 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2018-06-22 19:54:03,149 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:54:03,149 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:54:03,149 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 19:54:03,157 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:54:03,216 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:54:03,216 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:03,222 INFO ]: Computing forward predicates... [2018-06-22 19:54:03,348 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 19:54:05,598 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:54:05,617 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:54:05,617 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:54:05,617 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:54:05,618 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:54:05,618 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:54:05,618 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:54:05,769 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-06-22 19:54:06,047 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:54:06,047 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:54:06,048 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:54:06,048 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:54:06,048 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:54:06,049 INFO ]: With dead ends: 17 [2018-06-22 19:54:06,049 INFO ]: Without dead ends: 17 [2018-06-22 19:54:06,049 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:54:06,049 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:54:06,052 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:54:06,052 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:54:06,053 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:54:06,053 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:54:06,053 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:54:06,053 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:54:06,053 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:54:06,053 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:54:06,054 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:54:06,054 INFO ]: Found error trace [2018-06-22 19:54:06,054 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:54:06,054 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:54:06,054 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:54:06,054 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:54:06,054 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:54:06,055 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:06,055 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:54:06,055 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:54:06,087 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:06,376 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2018-06-22 19:54:06,430 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 19:54:06,430 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:54:06,430 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:54:06,445 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:54:06,542 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:54:06,542 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:54:06,547 INFO ]: Computing forward predicates... [2018-06-22 19:54:06,654 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 19:54:07,910 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:54:07,913 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:54:07,919 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:54:07,925 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:54:09,538 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2018-06-22 19:54:10,979 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 127 DAG size of output: 66 [2018-06-22 19:54:11,190 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2018-06-22 19:54:12,287 WARN ]: Spent 457.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2018-06-22 19:54:12,415 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:54:12,440 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:54:12,440 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-06-22 19:54:12,440 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:54:12,440 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:54:12,440 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:54:12,440 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 19:54:13,263 WARN ]: Spent 739.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2018-06-22 19:54:13,598 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-06-22 19:54:14,312 WARN ]: Spent 647.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 79 [2018-06-22 19:54:15,109 WARN ]: Spent 743.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 102 [2018-06-22 19:54:15,830 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2018-06-22 19:54:15,840 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:54:15,840 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:54:15,840 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:54:15,840 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 19:54:15,840 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:54:15,840 INFO ]: With dead ends: 13 [2018-06-22 19:54:15,840 INFO ]: Without dead ends: 0 [2018-06-22 19:54:15,841 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 19:54:15,841 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:54:15,841 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:54:15,841 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:54:15,841 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:54:15,841 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:54:15,841 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:54:15,841 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:54:15,841 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:54:15,841 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:54:15,841 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:54:15,845 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:54:15 BoogieIcfgContainer [2018-06-22 19:54:15,845 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:54:15,846 INFO ]: Toolchain (without parser) took 15632.56 ms. Allocated memory was 307.2 MB in the beginning and 633.9 MB in the end (delta: 326.6 MB). Free memory was 259.8 MB in the beginning and 255.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 330.8 MB. Max. memory is 3.6 GB. [2018-06-22 19:54:15,848 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 271.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:54:15,848 INFO ]: ChcToBoogie took 57.36 ms. Allocated memory is still 307.2 MB. Free memory was 259.8 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:54:15,849 INFO ]: Boogie Preprocessor took 46.99 ms. Allocated memory is still 307.2 MB. Free memory was 257.8 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:54:15,849 INFO ]: RCFGBuilder took 344.66 ms. Allocated memory is still 307.2 MB. Free memory was 255.8 MB in the beginning and 243.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:54:15,849 INFO ]: TraceAbstraction took 15174.74 ms. Allocated memory was 307.2 MB in the beginning and 633.9 MB in the end (delta: 326.6 MB). Free memory was 243.8 MB in the beginning and 255.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 314.8 MB. Max. memory is 3.6 GB. [2018-06-22 19:54:15,852 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 271.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.36 ms. Allocated memory is still 307.2 MB. Free memory was 259.8 MB in the beginning and 257.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.99 ms. Allocated memory is still 307.2 MB. Free memory was 257.8 MB in the beginning and 255.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 344.66 ms. Allocated memory is still 307.2 MB. Free memory was 255.8 MB in the beginning and 243.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 15174.74 ms. Allocated memory was 307.2 MB in the beginning and 633.9 MB in the end (delta: 326.6 MB). Free memory was 243.8 MB in the beginning and 255.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 314.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 15.1s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 4.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 36 SDslu, 113 SDs, 0 SdLazy, 101 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 40036 SizeOfPredicates, 83 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-54-15-867.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-54-15-867.csv Received shutdown request...