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/sally-chc-benchmarks/misc/fourslot.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:36:25,364 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:36:25,366 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:36:25,379 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:36:25,380 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:36:25,381 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:36:25,382 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:36:25,385 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:36:25,387 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:36:25,387 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:36:25,389 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:36:25,390 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:36:25,390 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:36:25,391 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:36:25,392 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:36:25,394 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:36:25,396 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:36:25,397 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:36:25,406 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:36:25,407 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:36:25,408 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:36:25,410 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:36:25,411 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:36:25,411 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:36:25,412 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:36:25,413 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:36:25,413 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:36:25,414 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:36:25,415 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:36:25,415 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:36:25,416 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:36:25,416 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:36:25,417 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:36:25,417 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:36:25,418 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:36:25,418 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 12:36:25,430 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:36:25,431 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:36:25,431 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:36:25,431 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:36:25,432 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:36:25,432 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:36:25,433 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:36:25,433 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:36:25,433 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:36:25,433 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:36:25,433 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:36:25,433 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:36:25,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:36:25,435 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:36:25,436 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:36:25,436 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:36:25,490 INFO ]: Repository-Root is: /tmp [2018-06-22 12:36:25,505 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:36:25,508 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:36:25,509 INFO ]: Initializing SmtParser... [2018-06-22 12:36:25,510 INFO ]: SmtParser initialized [2018-06-22 12:36:25,510 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-22 12:36:25,512 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 12:36:25,604 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 unknown [2018-06-22 12:36:25,839 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-22 12:36:25,844 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:36:25,850 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:36:25,851 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:36:25,851 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:36:25,851 INFO ]: ChcToBoogie initialized [2018-06-22 12:36:25,854 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,903 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25 Unit [2018-06-22 12:36:25,903 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:36:25,904 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:36:25,904 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:36:25,904 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:36:25,927 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,927 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,936 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,936 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,950 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,951 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,953 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... [2018-06-22 12:36:25,954 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:36:25,955 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:36:25,955 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:36:25,955 INFO ]: RCFGBuilder initialized [2018-06-22 12:36:25,956 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:36:25,973 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:36:25,973 INFO ]: Found specification of procedure False [2018-06-22 12:36:25,973 INFO ]: Found implementation of procedure False [2018-06-22 12:36:25,973 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:36:25,973 INFO ]: Found specification of procedure invariant [2018-06-22 12:36:25,973 INFO ]: Found implementation of procedure invariant [2018-06-22 12:36:25,973 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:36:25,973 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:36:25,973 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 12:36:26,236 INFO ]: Using library mode [2018-06-22 12:36:26,237 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:36:26 BoogieIcfgContainer [2018-06-22 12:36:26,237 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:36:26,238 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:36:26,238 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:36:26,241 INFO ]: TraceAbstraction initialized [2018-06-22 12:36:26,241 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:36:25" (1/3) ... [2018-06-22 12:36:26,242 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9c979a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:36:26, skipping insertion in model container [2018-06-22 12:36:26,242 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:36:25" (2/3) ... [2018-06-22 12:36:26,243 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9c979a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:36:26, skipping insertion in model container [2018-06-22 12:36:26,243 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:36:26" (3/3) ... [2018-06-22 12:36:26,244 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:36:26,253 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:36:26,261 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:36:26,294 INFO ]: Using default assertion order modulation [2018-06-22 12:36:26,295 INFO ]: Interprodecural is true [2018-06-22 12:36:26,295 INFO ]: Hoare is false [2018-06-22 12:36:26,295 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:36:26,295 INFO ]: Backedges is TWOTRACK [2018-06-22 12:36:26,295 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:36:26,295 INFO ]: Difference is false [2018-06-22 12:36:26,295 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:36:26,295 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:36:26,308 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:36:26,320 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:36:26,321 INFO ]: Found error trace [2018-06-22 12:36:26,321 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:36:26,322 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:36:26,327 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 12:36:26,329 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:36:26,330 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:36:26,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:26,362 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:36:26,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:26,411 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:26,532 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:36:26,535 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:36:26,535 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:36:26,537 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:36:26,547 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:36:26,547 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:36:26,549 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:36:26,655 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:36:26,656 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:36:26,661 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:36:26,662 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:36:26,662 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:36:26,677 INFO ]: With dead ends: 13 [2018-06-22 12:36:26,678 INFO ]: Without dead ends: 13 [2018-06-22 12:36:26,679 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 12:36:26,696 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:36:26,722 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:36:26,724 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:36:26,724 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:36:26,726 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:36:26,726 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:36:26,726 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:36:26,726 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:36:26,726 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:36:26,727 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:36:26,727 INFO ]: Found error trace [2018-06-22 12:36:26,728 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:36:26,728 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:36:26,728 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 12:36:26,728 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:36:26,728 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:36:26,731 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:26,732 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:36:26,732 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:26,789 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:27,066 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:36:27,066 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:36:27,066 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 12:36:27,076 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:36:27,130 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:27,142 INFO ]: Computing forward predicates... [2018-06-22 12:36:28,491 WARN ]: Spent 594.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-06-22 12:36:28,835 WARN ]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 12:36:28,838 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:36:28,870 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:36:28,871 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 12:36:28,871 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:36:28,871 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:36:28,871 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:36:28,872 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 12:36:29,369 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-06-22 12:36:29,402 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:36:29,402 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 12:36:29,403 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:36:29,403 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 12:36:29,403 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:36:29,403 INFO ]: With dead ends: 15 [2018-06-22 12:36:29,403 INFO ]: Without dead ends: 15 [2018-06-22 12:36:29,404 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 12:36:29,404 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:36:29,407 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:36:29,407 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:36:29,407 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 12:36:29,407 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 12:36:29,407 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:36:29,407 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 12:36:29,407 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:36:29,408 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 12:36:29,408 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:36:29,408 INFO ]: Found error trace [2018-06-22 12:36:29,408 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:36:29,408 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:36:29,408 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 12:36:29,408 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:36:29,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:36:29,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:29,409 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:36:29,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:29,470 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:30,037 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:36:30,038 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:36:30,038 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 12:36:30,047 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:36:30,077 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:36:30,077 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:30,081 INFO ]: Computing forward predicates... [2018-06-22 12:36:38,453 WARN ]: Spent 3.30 s on a formula simplification. DAG size of input: 183 DAG size of output: 114 [2018-06-22 12:36:45,969 WARN ]: Spent 2.34 s on a formula simplification. DAG size of input: 169 DAG size of output: 113 [2018-06-22 12:36:46,458 WARN ]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 12:36:47,104 WARN ]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 12:36:49,722 WARN ]: Spent 1.48 s on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-06-22 12:36:49,731 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:36:49,762 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:36:49,762 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 12:36:49,762 INFO ]: Interpolant automaton has 14 states [2018-06-22 12:36:49,762 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 12:36:49,763 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-22 12:36:49,763 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 12:36:53,519 WARN ]: Spent 3.56 s on a formula simplification. DAG size of input: 188 DAG size of output: 121 [2018-06-22 12:36:54,212 WARN ]: Spent 543.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 48 [2018-06-22 12:36:54,992 WARN ]: Spent 682.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 66 [2018-06-22 12:36:57,155 WARN ]: Spent 2.07 s on a formula simplification. DAG size of input: 193 DAG size of output: 126 [2018-06-22 12:36:57,278 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:36:57,278 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 12:36:57,279 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:36:57,279 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 12:36:57,279 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:36:57,279 INFO ]: With dead ends: 19 [2018-06-22 12:36:57,279 INFO ]: Without dead ends: 19 [2018-06-22 12:36:57,280 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2018-06-22 12:36:57,280 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 12:36:57,283 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 12:36:57,283 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 12:36:57,283 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 12:36:57,283 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 12:36:57,284 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:36:57,284 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 12:36:57,284 INFO ]: Interpolant automaton has 14 states. [2018-06-22 12:36:57,284 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 12:36:57,284 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 12:36:57,284 INFO ]: Found error trace [2018-06-22 12:36:57,284 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:36:57,285 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:36:57,285 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 3 times [2018-06-22 12:36:57,285 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:36:57,285 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:36:57,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:57,286 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:36:57,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:36:57,369 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:57,921 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2018-06-22 12:36:58,097 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2018-06-22 12:36:58,489 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 12:36:58,490 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:36:58,490 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 12:36:58,496 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:36:58,594 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 12:36:58,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:36:58,601 INFO ]: Computing forward predicates... [2018-06-22 12:37:01,933 WARN ]: Spent 2.76 s on a formula simplification. DAG size of input: 187 DAG size of output: 128 [2018-06-22 12:37:11,715 WARN ]: Spent 5.92 s on a formula simplification. DAG size of input: 259 DAG size of output: 176 [2018-06-22 12:37:12,061 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2018-06-22 12:37:12,079 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 12:37:24,252 WARN ]: Removed 463 from assertion stack [2018-06-22 12:37:24,252 INFO ]: Timeout while computing interpolants [2018-06-22 12:37:24,453 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:37:24,453 WARN ]: Verification canceled [2018-06-22 12:37:24,458 WARN ]: Timeout [2018-06-22 12:37:24,458 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:37:24 BoogieIcfgContainer [2018-06-22 12:37:24,458 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:37:24,461 INFO ]: Toolchain (without parser) took 58615.85 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 258.0 MB in the beginning and 442.3 MB in the end (delta: -184.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:37:24,462 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:37:24,462 INFO ]: ChcToBoogie took 52.74 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:24,462 INFO ]: Boogie Preprocessor took 50.28 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 254.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:24,463 INFO ]: RCFGBuilder took 281.69 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 243.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:37:24,463 INFO ]: TraceAbstraction took 58220.01 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 243.0 MB in the beginning and 442.4 MB in the end (delta: -199.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:37:24,470 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 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.74 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.28 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 254.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 281.69 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 243.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58220.01 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 243.0 MB in the beginning and 442.4 MB in the end (delta: -199.4 MB). Peak memory consumption was 1.3 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 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 811. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.1s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 8.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 23 SDslu, 80 SDs, 0 SdLazy, 62 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 22.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 49512 SizeOfPredicates, 84 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/fourslot.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-37-24-483.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-37-24-483.csv Completed graceful shutdown