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/car_4_e3_57_e4_1047.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:53:41,388 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:53:41,392 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:53:41,405 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:53:41,405 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:53:41,406 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:53:41,409 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:53:41,411 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:53:41,412 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:53:41,413 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:53:41,414 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:53:41,415 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:53:41,416 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:53:41,417 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:53:41,417 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:53:41,418 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:53:41,421 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:53:41,423 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:53:41,433 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:53:41,434 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:53:41,434 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:53:41,436 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:53:41,436 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:53:41,437 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:53:41,437 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:53:41,440 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:53:41,441 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:53:41,441 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:53:41,442 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:53:41,442 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:53:41,447 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:53:41,448 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:53:41,448 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:53:41,448 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:53:41,449 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:53:41,449 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 15:53:41,472 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:53:41,472 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:53:41,472 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:53:41,473 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:53:41,474 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:53:41,474 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:53:41,474 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:53:41,475 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:53:41,475 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:53:41,475 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:53:41,475 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:53:41,475 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:53:41,475 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:53:41,476 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:53:41,478 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:53:41,478 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:53:41,524 INFO ]: Repository-Root is: /tmp [2018-06-22 15:53:41,536 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:53:41,539 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:53:41,543 INFO ]: Initializing SmtParser... [2018-06-22 15:53:41,543 INFO ]: SmtParser initialized [2018-06-22 15:53:41,544 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e3_57_e4_1047.smt2 [2018-06-22 15:53:41,545 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 15:53:41,635 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e3_57_e4_1047.smt2 unknown [2018-06-22 15:53:41,982 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e3_57_e4_1047.smt2 [2018-06-22 15:53:41,986 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:53:41,997 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:53:41,997 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:53:41,997 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:53:41,997 INFO ]: ChcToBoogie initialized [2018-06-22 15:53:42,000 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:53:41" (1/1) ... [2018-06-22 15:53:42,057 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42 Unit [2018-06-22 15:53:42,057 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:53:42,057 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:53:42,057 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:53:42,057 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:53:42,079 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,079 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,088 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,089 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,100 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,101 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,111 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (1/1) ... [2018-06-22 15:53:42,113 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:53:42,113 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:53:42,113 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:53:42,114 INFO ]: RCFGBuilder initialized [2018-06-22 15:53:42,114 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (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 15:53:42,133 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:53:42,133 INFO ]: Found specification of procedure False [2018-06-22 15:53:42,133 INFO ]: Found implementation of procedure False [2018-06-22 15:53:42,133 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:53:42,133 INFO ]: Found specification of procedure state [2018-06-22 15:53:42,133 INFO ]: Found implementation of procedure state [2018-06-22 15:53:42,133 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:53:42,133 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:53:42,133 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 15:53:42,432 INFO ]: Using library mode [2018-06-22 15:53:42,433 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:53:42 BoogieIcfgContainer [2018-06-22 15:53:42,433 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:53:42,434 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:53:42,434 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:53:42,437 INFO ]: TraceAbstraction initialized [2018-06-22 15:53:42,437 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:53:41" (1/3) ... [2018-06-22 15:53:42,438 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c18494b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:53:42, skipping insertion in model container [2018-06-22 15:53:42,438 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:53:42" (2/3) ... [2018-06-22 15:53:42,438 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c18494b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:53:42, skipping insertion in model container [2018-06-22 15:53:42,438 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:53:42" (3/3) ... [2018-06-22 15:53:42,443 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:53:42,452 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:53:42,462 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:53:42,500 INFO ]: Using default assertion order modulation [2018-06-22 15:53:42,500 INFO ]: Interprodecural is true [2018-06-22 15:53:42,500 INFO ]: Hoare is false [2018-06-22 15:53:42,500 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:53:42,500 INFO ]: Backedges is TWOTRACK [2018-06-22 15:53:42,500 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:53:42,500 INFO ]: Difference is false [2018-06-22 15:53:42,500 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:53:42,500 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:53:42,512 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:53:42,521 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:53:42,522 INFO ]: Found error trace [2018-06-22 15:53:42,522 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:53:42,523 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:53:42,528 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:53:42,529 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:53:42,530 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:53:42,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:42,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:53:42,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:42,628 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:53:42,793 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:53:42,794 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:53:42,795 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:53:42,796 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:53:42,806 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:53:42,806 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:53:42,809 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:53:42,912 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:53:42,913 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:53:42,914 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:53:42,915 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:53:42,916 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:53:42,927 INFO ]: With dead ends: 13 [2018-06-22 15:53:42,928 INFO ]: Without dead ends: 13 [2018-06-22 15:53:42,929 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 15:53:42,942 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:53:42,966 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:53:42,968 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:53:42,968 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:53:42,969 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:53:42,970 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:53:42,970 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:53:42,970 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:53:42,970 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:53:42,971 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:53:42,971 INFO ]: Found error trace [2018-06-22 15:53:42,971 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:53:42,971 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:53:42,971 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:53:42,971 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:53:42,971 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:53:42,972 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:42,972 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:53:42,972 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:43,062 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:53:43,412 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-06-22 15:53:43,542 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:53:43,543 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:53:43,543 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 15:53:43,550 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:53:43,673 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:53:43,684 INFO ]: Computing forward predicates... [2018-06-22 15:53:44,068 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:53:44,107 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:53:44,107 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 15:53:44,108 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:53:44,108 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:53:44,108 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:53:44,108 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 15:53:44,793 WARN ]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 15:53:45,036 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:53:45,036 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:53:45,036 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:53:45,036 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 15:53:45,036 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:53:45,037 INFO ]: With dead ends: 15 [2018-06-22 15:53:45,037 INFO ]: Without dead ends: 15 [2018-06-22 15:53:45,038 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:53:45,038 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:53:45,040 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:53:45,040 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:53:45,041 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:53:45,041 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:53:45,041 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:53:45,041 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:53:45,041 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:53:45,041 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:53:45,042 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:53:45,042 INFO ]: Found error trace [2018-06-22 15:53:45,042 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:53:45,042 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:53:45,042 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:53:45,042 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:53:45,042 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:53:45,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:45,043 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:53:45,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:53:45,093 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:53:45,593 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2018-06-22 15:53:45,663 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:53:45,663 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:53:45,663 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 15:53:45,673 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:53:45,748 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:53:45,749 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:53:45,753 INFO ]: Computing forward predicates... [2018-06-22 15:53:46,297 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 15:53:46,701 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:53:46,721 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:53:46,721 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 15:53:46,722 INFO ]: Interpolant automaton has 12 states [2018-06-22 15:53:46,722 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 15:53:46,722 INFO ]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:53:46,722 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 15:53:46,909 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:53:46,909 INFO ]: Finished difference Result 11 states and 12 transitions. [2018-06-22 15:53:46,909 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:53:46,909 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 15:53:46,909 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:53:46,909 INFO ]: With dead ends: 11 [2018-06-22 15:53:46,909 INFO ]: Without dead ends: 0 [2018-06-22 15:53:46,911 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:53:46,911 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 15:53:46,911 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 15:53:46,911 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 15:53:46,911 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 15:53:46,911 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-22 15:53:46,911 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:53:46,911 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 15:53:46,911 INFO ]: Interpolant automaton has 12 states. [2018-06-22 15:53:46,911 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 15:53:46,911 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 15:53:46,917 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:53:46 BoogieIcfgContainer [2018-06-22 15:53:46,917 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:53:46,918 INFO ]: Toolchain (without parser) took 4930.78 ms. Allocated memory was 307.2 MB in the beginning and 348.7 MB in the end (delta: 41.4 MB). Free memory was 255.8 MB in the beginning and 299.9 MB in the end (delta: -44.1 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:53:46,919 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.2 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:53:46,919 INFO ]: ChcToBoogie took 59.83 ms. Allocated memory is still 307.2 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:53:46,920 INFO ]: Boogie Preprocessor took 55.79 ms. Allocated memory is still 307.2 MB. Free memory was 253.8 MB in the beginning and 251.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:53:46,920 INFO ]: RCFGBuilder took 319.55 ms. Allocated memory is still 307.2 MB. Free memory was 251.8 MB in the beginning and 235.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:53:46,921 INFO ]: TraceAbstraction took 4482.37 ms. Allocated memory was 307.2 MB in the beginning and 348.7 MB in the end (delta: 41.4 MB). Free memory was 235.8 MB in the beginning and 299.9 MB in the end (delta: -64.1 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:53:46,924 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 307.2 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.83 ms. Allocated memory is still 307.2 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 55.79 ms. Allocated memory is still 307.2 MB. Free memory was 253.8 MB in the beginning and 251.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 319.55 ms. Allocated memory is still 307.2 MB. Free memory was 251.8 MB in the beginning and 235.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4482.37 ms. Allocated memory was 307.2 MB in the beginning and 348.7 MB in the end (delta: 41.4 MB). Free memory was 235.8 MB in the beginning and 299.9 MB in the end (delta: -64.1 MB). There was no memory consumed. 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, 4.4s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 12 SDslu, 64 SDs, 0 SdLazy, 56 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 3152 SizeOfPredicates, 41 NumberOfNonLiveVariables, 586 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/car_4_e3_57_e4_1047.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-53-46-934.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_4_e3_57_e4_1047.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-53-46-934.csv Received shutdown request...