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/ex3_e7_590_e7_590.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 17:25:17,498 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 17:25:17,501 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 17:25:17,510 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 17:25:17,511 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 17:25:17,512 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 17:25:17,513 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 17:25:17,514 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 17:25:17,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 17:25:17,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 17:25:17,517 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 17:25:17,518 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 17:25:17,518 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 17:25:17,519 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 17:25:17,520 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 17:25:17,521 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 17:25:17,523 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 17:25:17,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 17:25:17,533 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 17:25:17,535 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 17:25:17,536 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 17:25:17,538 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 17:25:17,538 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 17:25:17,539 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 17:25:17,540 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 17:25:17,540 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 17:25:17,541 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 17:25:17,551 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 17:25:17,552 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 17:25:17,553 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 17:25:17,553 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 17:25:17,554 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 17:25:17,554 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 17:25:17,555 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 17:25:17,555 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 17:25:17,556 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 17:25:17,569 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 17:25:17,569 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 17:25:17,569 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 17:25:17,570 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 17:25:17,571 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 17:25:17,571 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 17:25:17,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 17:25:17,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 17:25:17,572 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 17:25:17,572 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 17:25:17,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 17:25:17,572 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 17:25:17,572 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 17:25:17,573 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 17:25:17,573 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 17:25:17,573 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 17:25:17,573 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 17:25:17,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 17:25:17,574 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 17:25:17,575 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 17:25:17,575 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 17:25:17,625 INFO ]: Repository-Root is: /tmp [2018-06-22 17:25:17,642 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 17:25:17,647 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 17:25:17,648 INFO ]: Initializing SmtParser... [2018-06-22 17:25:17,648 INFO ]: SmtParser initialized [2018-06-22 17:25:17,650 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 [2018-06-22 17:25:17,651 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 17:25:17,752 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 unknown [2018-06-22 17:25:18,060 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590_e7_590.smt2 [2018-06-22 17:25:18,065 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 17:25:18,071 INFO ]: Walking toolchain with 4 elements. [2018-06-22 17:25:18,071 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 17:25:18,071 INFO ]: Initializing ChcToBoogie... [2018-06-22 17:25:18,071 INFO ]: ChcToBoogie initialized [2018-06-22 17:25:18,075 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,128 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18 Unit [2018-06-22 17:25:18,128 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 17:25:18,129 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 17:25:18,129 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 17:25:18,129 INFO ]: Boogie Preprocessor initialized [2018-06-22 17:25:18,154 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,154 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,164 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,164 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,178 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,179 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,181 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (1/1) ... [2018-06-22 17:25:18,182 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 17:25:18,183 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 17:25:18,183 INFO ]: Initializing RCFGBuilder... [2018-06-22 17:25:18,183 INFO ]: RCFGBuilder initialized [2018-06-22 17:25:18,193 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (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 17:25:18,211 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 17:25:18,211 INFO ]: Found specification of procedure False [2018-06-22 17:25:18,211 INFO ]: Found implementation of procedure False [2018-06-22 17:25:18,211 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 17:25:18,211 INFO ]: Found specification of procedure state [2018-06-22 17:25:18,211 INFO ]: Found implementation of procedure state [2018-06-22 17:25:18,211 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 17:25:18,211 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 17:25:18,211 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 17:25:18,490 INFO ]: Using library mode [2018-06-22 17:25:18,491 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:25:18 BoogieIcfgContainer [2018-06-22 17:25:18,491 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 17:25:18,492 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 17:25:18,493 INFO ]: Initializing TraceAbstraction... [2018-06-22 17:25:18,496 INFO ]: TraceAbstraction initialized [2018-06-22 17:25:18,496 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:25:18" (1/3) ... [2018-06-22 17:25:18,497 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfce651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:25:18, skipping insertion in model container [2018-06-22 17:25:18,497 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:25:18" (2/3) ... [2018-06-22 17:25:18,497 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfce651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:25:18, skipping insertion in model container [2018-06-22 17:25:18,497 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:25:18" (3/3) ... [2018-06-22 17:25:18,499 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 17:25:18,508 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 17:25:18,518 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 17:25:18,558 INFO ]: Using default assertion order modulation [2018-06-22 17:25:18,559 INFO ]: Interprodecural is true [2018-06-22 17:25:18,559 INFO ]: Hoare is false [2018-06-22 17:25:18,559 INFO ]: Compute interpolants for FPandBP [2018-06-22 17:25:18,559 INFO ]: Backedges is TWOTRACK [2018-06-22 17:25:18,559 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 17:25:18,559 INFO ]: Difference is false [2018-06-22 17:25:18,559 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 17:25:18,559 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 17:25:18,576 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 17:25:18,590 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 17:25:18,590 INFO ]: Found error trace [2018-06-22 17:25:18,591 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:25:18,591 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:25:18,597 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 17:25:18,599 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:25:18,600 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:25:18,638 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:18,638 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:25:18,638 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:18,704 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:18,814 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 17:25:18,817 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 17:25:18,817 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 17:25:18,819 INFO ]: Interpolant automaton has 4 states [2018-06-22 17:25:18,834 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 17:25:18,834 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 17:25:18,837 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 17:25:18,944 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:25:18,944 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:25:18,945 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 17:25:18,946 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 17:25:18,946 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:25:18,957 INFO ]: With dead ends: 13 [2018-06-22 17:25:18,957 INFO ]: Without dead ends: 13 [2018-06-22 17:25:18,959 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 17:25:18,972 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 17:25:19,006 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 17:25:19,007 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 17:25:19,008 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 17:25:19,009 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 17:25:19,009 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:25:19,009 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 17:25:19,009 INFO ]: Interpolant automaton has 4 states. [2018-06-22 17:25:19,009 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 17:25:19,010 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 17:25:19,010 INFO ]: Found error trace [2018-06-22 17:25:19,011 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:25:19,011 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:25:19,011 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 17:25:19,011 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:25:19,011 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:25:19,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:19,012 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:25:19,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:19,053 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:19,257 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:25:19,257 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:25:19,257 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 17:25:19,265 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:25:19,346 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:19,357 INFO ]: Computing forward predicates... [2018-06-22 17:25:19,919 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-22 17:25:20,009 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:25:20,031 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:25:20,031 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 17:25:20,031 INFO ]: Interpolant automaton has 8 states [2018-06-22 17:25:20,031 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 17:25:20,032 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 17:25:20,032 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 17:25:20,290 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 17:25:20,328 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:25:20,328 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 17:25:20,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:25:20,328 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 17:25:20,328 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:25:20,329 INFO ]: With dead ends: 15 [2018-06-22 17:25:20,329 INFO ]: Without dead ends: 15 [2018-06-22 17:25:20,330 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 17:25:20,330 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 17:25:20,333 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 17:25:20,333 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 17:25:20,333 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 17:25:20,334 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 17:25:20,334 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:25:20,334 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 17:25:20,334 INFO ]: Interpolant automaton has 8 states. [2018-06-22 17:25:20,334 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 17:25:20,334 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 17:25:20,334 INFO ]: Found error trace [2018-06-22 17:25:20,334 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:25:20,335 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:25:20,335 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 17:25:20,335 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:25:20,335 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:25:20,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:20,336 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:25:20,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:20,441 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:21,192 WARN ]: Spent 522.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-06-22 17:25:21,331 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:25:21,331 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:25:21,331 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 17:25:21,339 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 17:25:21,404 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 17:25:21,404 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:21,409 INFO ]: Computing forward predicates... [2018-06-22 17:25:21,622 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-06-22 17:25:22,458 WARN ]: Spent 350.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2018-06-22 17:25:22,737 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:25:22,768 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:25:22,768 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 17:25:22,769 INFO ]: Interpolant automaton has 13 states [2018-06-22 17:25:22,769 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 17:25:22,770 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-22 17:25:22,770 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 17:25:23,140 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2018-06-22 17:25:23,322 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2018-06-22 17:25:23,699 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2018-06-22 17:25:23,746 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:25:23,746 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 17:25:23,748 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 17:25:23,748 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 17:25:23,748 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:25:23,748 INFO ]: With dead ends: 17 [2018-06-22 17:25:23,749 INFO ]: Without dead ends: 17 [2018-06-22 17:25:23,749 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-22 17:25:23,749 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 17:25:23,752 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 17:25:23,752 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 17:25:23,752 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 17:25:23,753 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 17:25:23,753 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:25:23,753 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 17:25:23,753 INFO ]: Interpolant automaton has 13 states. [2018-06-22 17:25:23,753 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 17:25:23,753 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 17:25:23,753 INFO ]: Found error trace [2018-06-22 17:25:23,754 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:25:23,754 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:25:23,754 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 17:25:23,754 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:25:23,754 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:25:23,755 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:23,755 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:25:23,755 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:25:23,784 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:24,220 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 3 [2018-06-22 17:25:24,221 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 17:25:24,221 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:25:24,221 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 17:25:24,237 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 17:25:24,286 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 17:25:24,286 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:25:24,290 INFO ]: Computing forward predicates... [2018-06-22 17:25:24,485 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:25:24,500 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 17:25:24,525 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:25:24,545 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:25:25,448 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:25:25,469 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:25:25,497 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-06-22 17:25:25,497 INFO ]: Interpolant automaton has 13 states [2018-06-22 17:25:25,497 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 17:25:25,497 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 17:25:25,498 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 17:25:25,810 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2018-06-22 17:25:25,968 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:25:25,968 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:25:25,968 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:25:25,968 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 17:25:25,969 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:25:25,969 INFO ]: With dead ends: 13 [2018-06-22 17:25:25,969 INFO ]: Without dead ends: 0 [2018-06-22 17:25:25,969 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-06-22 17:25:25,969 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 17:25:25,969 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 17:25:25,969 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 17:25:25,969 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 17:25:25,969 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 17:25:25,969 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:25:25,969 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 17:25:25,969 INFO ]: Interpolant automaton has 13 states. [2018-06-22 17:25:25,969 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 17:25:25,969 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 17:25:25,973 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:25:25 BoogieIcfgContainer [2018-06-22 17:25:25,973 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 17:25:25,974 INFO ]: Toolchain (without parser) took 7908.20 ms. Allocated memory was 298.3 MB in the beginning and 431.0 MB in the end (delta: 132.6 MB). Free memory was 250.9 MB in the beginning and 327.9 MB in the end (delta: -77.0 MB). Peak memory consumption was 55.6 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:25,975 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 298.3 MB. Free memory is still 263.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 17:25:25,975 INFO ]: ChcToBoogie took 57.62 ms. Allocated memory is still 298.3 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:25,976 INFO ]: Boogie Preprocessor took 53.53 ms. Allocated memory is still 298.3 MB. Free memory was 248.9 MB in the beginning and 246.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:25,976 INFO ]: RCFGBuilder took 307.88 ms. Allocated memory is still 298.3 MB. Free memory was 246.8 MB in the beginning and 235.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:25,977 INFO ]: TraceAbstraction took 7480.54 ms. Allocated memory was 298.3 MB in the beginning and 431.0 MB in the end (delta: 132.6 MB). Free memory was 235.8 MB in the beginning and 327.9 MB in the end (delta: -92.1 MB). Peak memory consumption was 40.6 MB. Max. memory is 3.6 GB. [2018-06-22 17:25:25,979 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 298.3 MB. Free memory is still 263.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.62 ms. Allocated memory is still 298.3 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 53.53 ms. Allocated memory is still 298.3 MB. Free memory was 248.9 MB in the beginning and 246.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 307.88 ms. Allocated memory is still 298.3 MB. Free memory was 246.8 MB in the beginning and 235.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 7480.54 ms. Allocated memory was 298.3 MB in the beginning and 431.0 MB in the end (delta: 132.6 MB). Free memory was 235.8 MB in the beginning and 327.9 MB in the end (delta: -92.1 MB). Peak memory consumption was 40.6 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, 7.4s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 28 SDslu, 122 SDs, 0 SdLazy, 102 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.1s 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, 4.7s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 14060 SizeOfPredicates, 74 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 102 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/ex3_e7_590_e7_590.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_17-25-25-989.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3_e7_590_e7_590.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_17-25-25-989.csv Received shutdown request...