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.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:54:32,861 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:54:32,862 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:54:32,878 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:54:32,879 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:54:32,880 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:54:32,881 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:54:32,882 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:54:32,884 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:54:32,884 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:54:32,886 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:54:32,886 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:54:32,887 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:54:32,888 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:54:32,889 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:54:32,891 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:54:32,893 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:54:32,894 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:54:32,904 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:54:32,905 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:54:32,906 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:54:32,907 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:54:32,908 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:54:32,912 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:54:32,913 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:54:32,914 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:54:32,914 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:54:32,915 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:54:32,916 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:54:32,917 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:54:32,918 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:54:32,918 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:54:32,918 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:54:32,919 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:54:32,920 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:54:32,920 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 15:54:32,937 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:54:32,937 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:54:32,937 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:54:32,937 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:54:32,938 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:54:32,939 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:54:32,939 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:54:32,939 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:54:32,939 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:54:32,939 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:54:32,940 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:54:32,940 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:54:32,940 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:54:32,940 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:54:32,940 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:54:32,941 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:54:32,941 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:54:32,941 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:54:32,941 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:54:32,945 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:54:32,945 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:54:32,989 INFO ]: Repository-Root is: /tmp [2018-06-22 15:54:33,004 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:54:33,010 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:54:33,012 INFO ]: Initializing SmtParser... [2018-06-22 15:54:33,012 INFO ]: SmtParser initialized [2018-06-22 15:54:33,012 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4.smt2 [2018-06-22 15:54:33,014 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 15:54:33,100 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4.smt2 unknown [2018-06-22 15:54:33,384 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4.smt2 [2018-06-22 15:54:33,388 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:54:33,396 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:54:33,396 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:54:33,396 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:54:33,396 INFO ]: ChcToBoogie initialized [2018-06-22 15:54:33,399 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,487 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33 Unit [2018-06-22 15:54:33,487 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:54:33,488 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:54:33,488 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:54:33,488 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:54:33,537 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,538 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,555 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,555 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,568 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,569 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,570 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (1/1) ... [2018-06-22 15:54:33,573 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:54:33,573 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:54:33,573 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:54:33,573 INFO ]: RCFGBuilder initialized [2018-06-22 15:54:33,574 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (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 15:54:33,601 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:54:33,602 INFO ]: Found specification of procedure False [2018-06-22 15:54:33,602 INFO ]: Found implementation of procedure False [2018-06-22 15:54:33,602 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:54:33,602 INFO ]: Found specification of procedure state [2018-06-22 15:54:33,602 INFO ]: Found implementation of procedure state [2018-06-22 15:54:33,602 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:54:33,602 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:54:33,602 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 15:54:33,969 INFO ]: Using library mode [2018-06-22 15:54:33,969 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:54:33 BoogieIcfgContainer [2018-06-22 15:54:33,969 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:54:33,970 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:54:33,970 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:54:33,976 INFO ]: TraceAbstraction initialized [2018-06-22 15:54:33,976 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:54:33" (1/3) ... [2018-06-22 15:54:33,977 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ef336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:54:33, skipping insertion in model container [2018-06-22 15:54:33,977 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:54:33" (2/3) ... [2018-06-22 15:54:33,977 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ef336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:54:33, skipping insertion in model container [2018-06-22 15:54:33,977 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:54:33" (3/3) ... [2018-06-22 15:54:33,979 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:54:33,989 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:54:33,999 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:54:34,049 INFO ]: Using default assertion order modulation [2018-06-22 15:54:34,049 INFO ]: Interprodecural is true [2018-06-22 15:54:34,049 INFO ]: Hoare is false [2018-06-22 15:54:34,049 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:54:34,049 INFO ]: Backedges is TWOTRACK [2018-06-22 15:54:34,049 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:54:34,049 INFO ]: Difference is false [2018-06-22 15:54:34,049 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:54:34,049 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:54:34,066 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:54:34,076 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:54:34,076 INFO ]: Found error trace [2018-06-22 15:54:34,077 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:54:34,077 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:54:34,083 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:54:34,085 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:54:34,085 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:54:34,125 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:34,125 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:54:34,125 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:34,201 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:34,407 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:54:34,408 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:54:34,408 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:54:34,410 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:54:34,420 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:54:34,420 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:54:34,422 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:54:34,521 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:54:34,521 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:54:34,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:54:34,523 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:54:34,524 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:54:34,532 INFO ]: With dead ends: 13 [2018-06-22 15:54:34,532 INFO ]: Without dead ends: 13 [2018-06-22 15:54:34,534 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 15:54:34,549 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:54:34,586 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:54:34,588 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:54:34,588 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:54:34,590 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:54:34,590 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:54:34,590 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:54:34,590 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:54:34,590 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:54:34,591 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:54:34,591 INFO ]: Found error trace [2018-06-22 15:54:34,591 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:54:34,592 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:54:34,592 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:54:34,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:54:34,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:54:34,593 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:34,593 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:54:34,593 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:34,666 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:35,490 WARN ]: Spent 577.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2018-06-22 15:54:35,644 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:54:35,644 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:54:35,644 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) [2018-06-22 15:54:35,662 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:54:35,760 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:35,769 INFO ]: Computing forward predicates... [2018-06-22 15:54:36,385 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-06-22 15:54:36,651 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:54:36,685 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:54:36,685 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:54:36,686 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:54:36,686 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:54:36,686 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:54:36,686 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:54:36,912 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 15:54:37,590 WARN ]: Spent 582.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2018-06-22 15:54:37,678 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:54:37,678 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:54:37,679 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:54:37,679 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:54:37,679 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:54:37,680 INFO ]: With dead ends: 15 [2018-06-22 15:54:37,680 INFO ]: Without dead ends: 15 [2018-06-22 15:54:37,681 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:54:37,681 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:54:37,683 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:54:37,683 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:54:37,684 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:54:37,684 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:54:37,685 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:54:37,685 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:54:37,685 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:54:37,685 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:54:37,685 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:54:37,685 INFO ]: Found error trace [2018-06-22 15:54:37,685 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:54:37,685 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:54:37,685 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:54:37,685 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:54:37,685 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:54:37,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:37,686 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:54:37,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:37,780 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:38,137 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:54:38,138 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:54:38,138 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) [2018-06-22 15:54:38,152 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:54:38,222 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:54:38,222 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:38,227 INFO ]: Computing forward predicates... [2018-06-22 15:54:39,199 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2018-06-22 15:54:39,377 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:54:39,409 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:54:39,409 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 15:54:39,409 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:54:39,410 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:54:39,410 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:54:39,410 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 15:54:39,679 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2018-06-22 15:54:39,866 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-06-22 15:54:40,058 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-06-22 15:54:40,140 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:54:40,140 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:54:40,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:54:40,142 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 15:54:40,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:54:40,143 INFO ]: With dead ends: 17 [2018-06-22 15:54:40,143 INFO ]: Without dead ends: 17 [2018-06-22 15:54:40,143 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:54:40,144 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:54:40,146 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:54:40,146 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:54:40,147 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:54:40,147 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:54:40,147 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:54:40,147 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:54:40,147 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:54:40,147 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:54:40,148 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:54:40,148 INFO ]: Found error trace [2018-06-22 15:54:40,148 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:54:40,148 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:54:40,148 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:54:40,148 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:54:40,148 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:54:40,150 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:40,150 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:54:40,150 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:54:40,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:40,634 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-06-22 15:54:40,793 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:54:40,793 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:54:40,793 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:54:40,810 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:54:40,904 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:54:40,904 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:54:40,910 INFO ]: Computing forward predicates... [2018-06-22 15:54:41,629 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:54:41,649 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:54:41,649 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 15:54:41,649 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:54:41,649 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:54:41,649 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:54:41,650 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 15:54:41,889 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2018-06-22 15:54:42,095 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2018-06-22 15:54:42,250 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-06-22 15:54:42,260 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:54:42,260 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:54:42,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:54:42,260 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 15:54:42,260 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:54:42,260 INFO ]: With dead ends: 13 [2018-06-22 15:54:42,260 INFO ]: Without dead ends: 0 [2018-06-22 15:54:42,261 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:54:42,261 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 15:54:42,261 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 15:54:42,261 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 15:54:42,261 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 15:54:42,261 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 15:54:42,261 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:54:42,261 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 15:54:42,261 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:54:42,261 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 15:54:42,261 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 15:54:42,265 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:54:42 BoogieIcfgContainer [2018-06-22 15:54:42,265 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:54:42,266 INFO ]: Toolchain (without parser) took 8876.88 ms. Allocated memory was 304.1 MB in the beginning and 434.1 MB in the end (delta: 130.0 MB). Free memory was 252.5 MB in the beginning and 339.0 MB in the end (delta: -86.6 MB). Peak memory consumption was 43.5 MB. Max. memory is 3.6 GB. [2018-06-22 15:54:42,266 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:54:42,267 INFO ]: ChcToBoogie took 91.71 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 250.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:54:42,267 INFO ]: Boogie Preprocessor took 84.65 ms. Allocated memory is still 304.1 MB. Free memory was 250.5 MB in the beginning and 248.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:54:42,268 INFO ]: RCFGBuilder took 396.33 ms. Allocated memory is still 304.1 MB. Free memory was 248.5 MB in the beginning and 232.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:54:42,268 INFO ]: TraceAbstraction took 8294.52 ms. Allocated memory was 304.1 MB in the beginning and 434.1 MB in the end (delta: 130.0 MB). Free memory was 232.5 MB in the beginning and 339.0 MB in the end (delta: -106.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 3.6 GB. [2018-06-22 15:54:42,271 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 91.71 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 250.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 84.65 ms. Allocated memory is still 304.1 MB. Free memory was 250.5 MB in the beginning and 248.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 396.33 ms. Allocated memory is still 304.1 MB. Free memory was 248.5 MB in the beginning and 232.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8294.52 ms. Allocated memory was 304.1 MB in the beginning and 434.1 MB in the end (delta: 130.0 MB). Free memory was 232.5 MB in the beginning and 339.0 MB in the end (delta: -106.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 8.2s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 34 SDslu, 146 SDs, 0 SdLazy, 131 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 12064 SizeOfPredicates, 94 NumberOfNonLiveVariables, 1071 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-54-42-281.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-54-42-281.csv Received shutdown request...