java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e8_118_e7_178.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:55:18,733 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:55:18,735 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:55:18,752 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:55:18,753 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:55:18,754 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:55:18,755 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:55:18,757 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:55:18,758 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:55:18,760 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:55:18,761 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:55:18,761 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:55:18,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:55:18,764 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:55:18,765 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:55:18,766 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:55:18,773 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:55:18,775 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:55:18,777 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:55:18,778 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:55:18,779 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:55:18,781 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:55:18,781 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:55:18,786 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:55:18,787 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:55:18,788 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:55:18,789 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:55:18,789 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:55:18,790 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:55:18,791 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:55:18,791 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:55:18,792 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:55:18,792 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:55:18,793 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:55:18,793 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:55:18,794 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:55:18,813 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:55:18,813 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:55:18,814 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:55:18,814 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:55:18,815 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:55:18,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:55:18,816 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:55:18,816 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:55:18,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:55:18,816 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:55:18,816 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:55:18,816 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:55:18,817 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:55:18,817 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:55:18,821 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:55:18,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:55:18,821 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:55:18,823 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:55:18,823 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:55:18,867 INFO ]: Repository-Root is: /tmp [2018-06-18 13:55:18,885 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:55:18,891 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:55:18,893 INFO ]: Initializing SmtParser... [2018-06-18 13:55:18,894 INFO ]: SmtParser initialized [2018-06-18 13:55:18,894 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e8_118_e7_178.smt2 [2018-06-18 13:55:18,896 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 13:55:18,995 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e8_118_e7_178.smt2 unknown [2018-06-18 13:55:19,360 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_4_e8_118_e7_178.smt2 [2018-06-18 13:55:19,364 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:55:19,376 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:55:19,377 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:55:19,377 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:55:19,377 INFO ]: ChcToBoogie initialized [2018-06-18 13:55:19,383 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,437 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19 Unit [2018-06-18 13:55:19,437 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:55:19,438 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:55:19,438 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:55:19,439 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:55:19,457 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,457 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,469 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,469 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,485 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,486 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,487 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... [2018-06-18 13:55:19,490 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:55:19,490 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:55:19,490 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:55:19,490 INFO ]: RCFGBuilder initialized [2018-06-18 13:55:19,500 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-18 13:55:19,515 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:55:19,515 INFO ]: Found specification of procedure False [2018-06-18 13:55:19,515 INFO ]: Found implementation of procedure False [2018-06-18 13:55:19,515 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:55:19,515 INFO ]: Found specification of procedure state [2018-06-18 13:55:19,515 INFO ]: Found implementation of procedure state [2018-06-18 13:55:19,515 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:55:19,515 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:55:19,515 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:55:19,874 INFO ]: Using library mode [2018-06-18 13:55:19,875 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:55:19 BoogieIcfgContainer [2018-06-18 13:55:19,875 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:55:19,878 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:55:19,878 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:55:19,882 INFO ]: TraceAbstraction initialized [2018-06-18 13:55:19,882 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:55:19" (1/3) ... [2018-06-18 13:55:19,883 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7492d1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:55:19, skipping insertion in model container [2018-06-18 13:55:19,883 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:55:19" (2/3) ... [2018-06-18 13:55:19,883 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7492d1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:55:19, skipping insertion in model container [2018-06-18 13:55:19,883 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:55:19" (3/3) ... [2018-06-18 13:55:19,885 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:55:19,895 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:55:19,902 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:55:19,955 INFO ]: Using default assertion order modulation [2018-06-18 13:55:19,955 INFO ]: Interprodecural is true [2018-06-18 13:55:19,955 INFO ]: Hoare is false [2018-06-18 13:55:19,955 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:55:19,955 INFO ]: Backedges is TWOTRACK [2018-06-18 13:55:19,956 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:55:19,956 INFO ]: Difference is false [2018-06-18 13:55:19,956 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:55:19,956 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:55:19,978 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:55:19,991 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:55:19,991 INFO ]: Found error trace [2018-06-18 13:55:19,992 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:55:19,992 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:55:19,997 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 13:55:19,999 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:55:19,999 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:55:20,040 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:20,040 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:55:20,040 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:20,122 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:20,133 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:55:20,372 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:55:20,373 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:55:20,374 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:55:20,375 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:55:20,386 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:55:20,386 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:55:20,389 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:55:20,486 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:55:20,486 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:55:20,487 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:55:20,488 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:55:20,488 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:55:20,505 INFO ]: With dead ends: 13 [2018-06-18 13:55:20,505 INFO ]: Without dead ends: 13 [2018-06-18 13:55:20,507 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:55:20,524 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:55:20,551 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:55:20,552 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:55:20,553 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:55:20,554 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:55:20,554 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:55:20,554 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:55:20,554 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:55:20,554 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:55:20,555 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:55:20,555 INFO ]: Found error trace [2018-06-18 13:55:20,555 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:55:20,555 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:55:20,555 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 13:55:20,555 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:55:20,555 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:55:20,556 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:20,556 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:55:20,556 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:20,619 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:20,620 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:55:21,142 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2018-06-18 13:55:21,292 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:55:21,292 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:55:21,292 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:55:21,302 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:55:21,392 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:21,402 INFO ]: Computing forward predicates... [2018-06-18 13:55:22,517 WARN ]: Spent 627.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 12 [2018-06-18 13:55:22,959 WARN ]: Spent 371.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-18 13:55:23,140 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:55:23,163 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:55:23,163 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:55:23,164 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:55:23,164 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:55:23,165 INFO ]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:55:23,165 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:55:23,442 WARN ]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-06-18 13:55:23,625 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:55:23,625 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:55:23,628 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:55:23,628 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:55:23,629 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:55:23,629 INFO ]: With dead ends: 15 [2018-06-18 13:55:23,629 INFO ]: Without dead ends: 15 [2018-06-18 13:55:23,630 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:55:23,631 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:55:23,633 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:55:23,633 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:55:23,634 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:55:23,634 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:55:23,634 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:55:23,634 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:55:23,634 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:55:23,634 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:55:23,635 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:55:23,635 INFO ]: Found error trace [2018-06-18 13:55:23,635 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:55:23,635 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:55:23,635 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 13:55:23,635 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:55:23,636 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:55:23,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:23,636 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:55:23,637 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:23,707 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:23,708 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:55:23,950 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2018-06-18 13:55:24,149 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2018-06-18 13:55:24,386 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 13:55:24,548 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:55:24,548 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:55:24,548 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:55:24,557 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:55:24,648 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:55:24,648 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:24,653 INFO ]: Computing forward predicates... [2018-06-18 13:55:25,040 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-06-18 13:55:25,186 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:55:25,208 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:55:25,208 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 13:55:25,208 INFO ]: Interpolant automaton has 13 states [2018-06-18 13:55:25,208 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 13:55:25,208 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-18 13:55:25,209 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 13:55:25,513 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2018-06-18 13:55:25,853 WARN ]: Spent 305.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-06-18 13:55:26,229 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2018-06-18 13:55:26,267 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:55:26,267 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:55:26,268 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:55:26,268 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 13:55:26,268 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:55:26,269 INFO ]: With dead ends: 17 [2018-06-18 13:55:26,269 INFO ]: Without dead ends: 17 [2018-06-18 13:55:26,270 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:55:26,270 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:55:26,273 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:55:26,273 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:55:26,274 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:55:26,274 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:55:26,274 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:55:26,274 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:55:26,274 INFO ]: Interpolant automaton has 13 states. [2018-06-18 13:55:26,274 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:55:26,275 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:55:26,275 INFO ]: Found error trace [2018-06-18 13:55:26,275 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:55:26,275 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:55:26,275 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 13:55:26,275 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:55:26,275 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:55:26,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:26,276 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:55:26,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:55:26,388 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:26,389 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:55:26,961 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2018-06-18 13:55:27,075 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2018-06-18 13:55:27,456 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:55:27,456 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:55:27,456 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 [2018-06-18 13:55:27,467 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:55:27,567 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:55:27,567 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:55:27,574 INFO ]: Computing forward predicates... [2018-06-18 13:55:28,364 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 15 [2018-06-18 13:55:29,719 WARN ]: Spent 909.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2018-06-18 13:55:29,957 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:55:29,978 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:55:29,978 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 13:55:29,979 INFO ]: Interpolant automaton has 17 states [2018-06-18 13:55:29,979 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 13:55:29,979 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:55:29,979 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 13:55:31,975 WARN ]: Spent 1.86 s on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2018-06-18 13:55:33,888 WARN ]: Spent 1.54 s on a formula simplification. DAG size of input: 124 DAG size of output: 91 [2018-06-18 13:55:35,107 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2018-06-18 13:55:35,948 WARN ]: Spent 803.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2018-06-18 13:55:35,968 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:55:35,968 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:55:35,968 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:55:35,968 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 13:55:35,968 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:55:35,968 INFO ]: With dead ends: 13 [2018-06-18 13:55:35,968 INFO ]: Without dead ends: 0 [2018-06-18 13:55:35,969 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-06-18 13:55:35,969 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 13:55:35,969 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 13:55:35,969 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 13:55:35,969 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 13:55:35,969 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 13:55:35,969 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:55:35,969 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 13:55:35,969 INFO ]: Interpolant automaton has 17 states. [2018-06-18 13:55:35,969 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 13:55:35,969 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 13:55:35,974 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:55:35 BoogieIcfgContainer [2018-06-18 13:55:35,974 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:55:35,975 INFO ]: Toolchain (without parser) took 16610.46 ms. Allocated memory was 303.6 MB in the beginning and 439.9 MB in the end (delta: 136.3 MB). Free memory was 252.0 MB in the beginning and 342.9 MB in the end (delta: -90.9 MB). Peak memory consumption was 45.4 MB. Max. memory is 3.6 GB. [2018-06-18 13:55:35,976 INFO ]: SmtParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 268.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:55:35,976 INFO ]: ChcToBoogie took 61.53 ms. Allocated memory is still 303.6 MB. Free memory was 252.0 MB in the beginning and 248.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:55:35,977 INFO ]: Boogie Preprocessor took 51.18 ms. Allocated memory is still 303.6 MB. Free memory is still 248.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:55:35,977 INFO ]: RCFGBuilder took 384.80 ms. Allocated memory is still 303.6 MB. Free memory was 248.0 MB in the beginning and 232.0 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:55:35,977 INFO ]: TraceAbstraction took 16096.14 ms. Allocated memory was 303.6 MB in the beginning and 439.9 MB in the end (delta: 136.3 MB). Free memory was 232.0 MB in the beginning and 342.9 MB in the end (delta: -110.9 MB). Peak memory consumption was 25.4 MB. Max. memory is 3.6 GB. [2018-06-18 13:55:35,984 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.12 ms. Allocated memory is still 303.6 MB. Free memory is still 268.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.53 ms. Allocated memory is still 303.6 MB. Free memory was 252.0 MB in the beginning and 248.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 51.18 ms. Allocated memory is still 303.6 MB. Free memory is still 248.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 384.80 ms. Allocated memory is still 303.6 MB. Free memory was 248.0 MB in the beginning and 232.0 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 16096.14 ms. Allocated memory was 303.6 MB in the beginning and 439.9 MB in the end (delta: 136.3 MB). Free memory was 232.0 MB in the beginning and 342.9 MB in the end (delta: -110.9 MB). Peak memory consumption was 25.4 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, 16.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 7.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 40 SDtfs, 35 SDslu, 140 SDs, 0 SdLazy, 123 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 11.8s 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, 0.5s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 17596 SizeOfPredicates, 102 NumberOfNonLiveVariables, 1071 ConjunctsInSsa, 146 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_e8_118_e7_178.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-55-35-996.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_4_e8_118_e7_178.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-55-35-996.csv Received shutdown request...