java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:02:16,502 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:02:16,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:02:16,517 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:02:16,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:02:16,518 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:02:16,519 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:02:16,521 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:02:16,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:02:16,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:02:16,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:02:16,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:02:16,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:02:16,527 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:02:16,527 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:02:16,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:02:16,530 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:02:16,532 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:02:16,533 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:02:16,534 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:02:16,536 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:02:16,538 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:02:16,539 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:02:16,539 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:02:16,540 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:02:16,541 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:02:16,542 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:02:16,542 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:02:16,543 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:02:16,544 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:02:16,544 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:02:16,545 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:02:16,545 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:02:16,546 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:02:16,547 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:02:16,547 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:02:16,561 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:02:16,562 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:02:16,562 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:02:16,562 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:02:16,564 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:02:16,564 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:02:16,564 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:02:16,565 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:02:16,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:02:16,565 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:02:16,565 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:02:16,565 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:02:16,566 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:02:16,566 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:02:16,566 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:02:16,566 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:02:16,567 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:02:16,568 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:02:16,568 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:02:16,616 INFO ]: Repository-Root is: /tmp [2018-06-18 12:02:16,635 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:02:16,642 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:02:16,643 INFO ]: Initializing SmtParser... [2018-06-18 12:02:16,644 INFO ]: SmtParser initialized [2018-06-18 12:02:16,644 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2.smt2 [2018-06-18 12:02:16,646 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 [2018-06-18 12:02:16,741 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2.smt2 unknown [2018-06-18 12:02:17,166 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2.smt2 [2018-06-18 12:02:17,171 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:02:17,176 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:02:17,177 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:02:17,177 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:02:17,177 INFO ]: ChcToBoogie initialized [2018-06-18 12:02:17,185 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:02:17" (1/1) ... [2018-06-18 12:02:18,365 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18 Unit [2018-06-18 12:02:18,366 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:02:18,366 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:02:18,366 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:02:18,367 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:02:18,393 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,393 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,466 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,466 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,562 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,563 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,593 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (1/1) ... [2018-06-18 12:02:18,637 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:02:18,638 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:02:18,638 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:02:18,638 INFO ]: RCFGBuilder initialized [2018-06-18 12:02:18,639 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (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) [2018-06-18 12:02:18,657 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:02:18,657 INFO ]: Found specification of procedure False [2018-06-18 12:02:18,657 INFO ]: Found implementation of procedure False [2018-06-18 12:02:18,658 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-18 12:02:18,658 INFO ]: Found specification of procedure invariant [2018-06-18 12:02:18,658 INFO ]: Found implementation of procedure invariant [2018-06-18 12:02:18,658 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:02:18,658 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:02:18,658 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 [2018-06-18 12:02:20,132 INFO ]: Using library mode [2018-06-18 12:02:20,133 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:02:20 BoogieIcfgContainer [2018-06-18 12:02:20,133 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:02:20,136 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:02:20,136 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:02:20,139 INFO ]: TraceAbstraction initialized [2018-06-18 12:02:20,140 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:02:17" (1/3) ... [2018-06-18 12:02:20,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abe9faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:02:20, skipping insertion in model container [2018-06-18 12:02:20,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:02:18" (2/3) ... [2018-06-18 12:02:20,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abe9faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:02:20, skipping insertion in model container [2018-06-18 12:02:20,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:02:20" (3/3) ... [2018-06-18 12:02:20,143 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:02:20,154 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:02:20,164 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:02:20,222 INFO ]: Using default assertion order modulation [2018-06-18 12:02:20,223 INFO ]: Interprodecural is true [2018-06-18 12:02:20,223 INFO ]: Hoare is false [2018-06-18 12:02:20,223 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:02:20,223 INFO ]: Backedges is TWOTRACK [2018-06-18 12:02:20,223 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:02:20,223 INFO ]: Difference is false [2018-06-18 12:02:20,223 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:02:20,223 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:02:20,240 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:02:20,254 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:02:20,254 INFO ]: Found error trace [2018-06-18 12:02:20,255 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:02:20,257 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:02:20,262 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 12:02:20,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:02:20,265 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:02:20,304 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:20,304 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:02:20,304 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:20,370 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:02:20,379 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:02:20,530 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:02:20,531 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:02:20,532 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:02:20,533 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:02:20,544 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:02:20,544 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:02:20,546 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:02:20,701 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:02:20,701 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:02:20,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:02:20,706 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:02:20,706 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:02:20,722 INFO ]: With dead ends: 13 [2018-06-18 12:02:20,722 INFO ]: Without dead ends: 13 [2018-06-18 12:02:20,724 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 [2018-06-18 12:02:20,745 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:02:20,782 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:02:20,785 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:02:20,785 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:02:20,787 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:02:20,787 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:02:20,787 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:02:20,787 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:02:20,787 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:02:20,788 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:02:20,789 INFO ]: Found error trace [2018-06-18 12:02:20,789 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:02:20,789 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:02:20,789 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 12:02:20,789 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:02:20,789 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:02:20,790 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:20,790 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:02:20,790 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:20,979 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:02:20,984 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:02:21,613 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-18 12:02:21,949 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-18 12:02:21,951 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:02:21,952 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:02:21,952 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 [2018-06-18 12:02:22,043 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:02:22,121 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:02:22,133 INFO ]: Computing forward predicates... [2018-06-18 12:02:23,099 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-06-18 12:02:23,273 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:02:23,304 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:02:23,304 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-18 12:02:23,304 INFO ]: Interpolant automaton has 10 states [2018-06-18 12:02:23,305 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-18 12:02:23,305 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-18 12:02:23,305 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-18 12:02:24,074 WARN ]: Spent 651.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2018-06-18 12:02:24,248 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-06-18 12:02:24,305 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:02:24,305 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 12:02:24,305 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 12:02:24,305 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-18 12:02:24,305 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:02:24,306 INFO ]: With dead ends: 17 [2018-06-18 12:02:24,306 INFO ]: Without dead ends: 17 [2018-06-18 12:02:24,307 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:02:24,307 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 12:02:24,310 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 12:02:24,311 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 12:02:24,311 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 12:02:24,311 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-18 12:02:24,311 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:02:24,311 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 12:02:24,311 INFO ]: Interpolant automaton has 10 states. [2018-06-18 12:02:24,311 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 12:02:24,312 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 12:02:24,312 INFO ]: Found error trace [2018-06-18 12:02:24,312 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:02:24,312 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:02:24,313 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 2 times [2018-06-18 12:02:24,313 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:02:24,313 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:02:24,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:24,317 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:02:24,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:02:24,512 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:02:24,513 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:02:25,065 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-06-18 12:02:25,212 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-06-18 12:02:26,236 WARN ]: Spent 900.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 66 [2018-06-18 12:02:26,432 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:02:26,433 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:02:26,433 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 [2018-06-18 12:02:26,447 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:02:26,518 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:02:26,518 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:02:26,527 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 12:03:25,364 INFO ]: Timeout while computing interpolants [2018-06-18 12:03:25,570 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:03:25,570 WARN ]: Verification canceled [2018-06-18 12:03:25,576 WARN ]: Timeout [2018-06-18 12:03:25,577 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:03:25 BoogieIcfgContainer [2018-06-18 12:03:25,577 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:03:25,579 INFO ]: Toolchain (without parser) took 68406.80 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.3 MB in the beginning and 355.3 MB in the end (delta: -107.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-18 12:03:25,580 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:03:25,580 INFO ]: ChcToBoogie took 1189.10 ms. Allocated memory was 307.8 MB in the beginning and 412.1 MB in the end (delta: 104.3 MB). Free memory was 248.3 MB in the beginning and 193.6 MB in the end (delta: 54.8 MB). Peak memory consumption was 184.7 MB. Max. memory is 3.6 GB. [2018-06-18 12:03:25,581 INFO ]: Boogie Preprocessor took 271.01 ms. Allocated memory is still 412.1 MB. Free memory was 193.6 MB in the beginning and 182.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 3.6 GB. [2018-06-18 12:03:25,581 INFO ]: RCFGBuilder took 1494.55 ms. Allocated memory is still 412.1 MB. Free memory was 182.0 MB in the beginning and 193.7 MB in the end (delta: -11.7 MB). Peak memory consumption was 35.4 MB. Max. memory is 3.6 GB. [2018-06-18 12:03:25,586 INFO ]: TraceAbstraction took 65440.65 ms. Allocated memory was 412.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 193.7 MB in the beginning and 355.3 MB in the end (delta: -161.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-18 12:03:25,589 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 1189.10 ms. Allocated memory was 307.8 MB in the beginning and 412.1 MB in the end (delta: 104.3 MB). Free memory was 248.3 MB in the beginning and 193.6 MB in the end (delta: 54.8 MB). Peak memory consumption was 184.7 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 271.01 ms. Allocated memory is still 412.1 MB. Free memory was 193.6 MB in the beginning and 182.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1494.55 ms. Allocated memory is still 412.1 MB. Free memory was 182.0 MB in the beginning and 193.7 MB in the end (delta: -11.7 MB). Peak memory consumption was 35.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65440.65 ms. Allocated memory was 412.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 193.7 MB in the beginning and 355.3 MB in the end (delta: -161.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 7 quantified variables from 12 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 65.3s OverallTime, 3 OverallIterations, 4 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 10 SDslu, 33 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2584 SizeOfPredicates, 46 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lfht_2.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-03-25-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lfht_2.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-03-25-622.csv Completed graceful shutdown