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/traffic.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 17:11:13,014 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 17:11:13,017 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 17:11:13,031 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 17:11:13,032 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 17:11:13,033 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 17:11:13,036 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 17:11:13,039 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 17:11:13,040 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 17:11:13,042 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 17:11:13,043 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 17:11:13,044 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 17:11:13,044 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 17:11:13,045 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 17:11:13,049 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 17:11:13,050 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 17:11:13,052 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 17:11:13,066 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 17:11:13,067 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 17:11:13,068 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 17:11:13,069 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 17:11:13,071 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 17:11:13,071 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 17:11:13,072 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 17:11:13,073 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 17:11:13,077 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 17:11:13,077 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 17:11:13,078 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 17:11:13,079 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 17:11:13,079 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 17:11:13,085 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 17:11:13,086 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 17:11:13,086 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 17:11:13,086 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 17:11:13,087 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 17:11:13,087 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 17:11:13,111 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 17:11:13,112 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 17:11:13,113 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 17:11:13,113 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 17:11:13,114 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 17:11:13,114 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 17:11:13,114 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 17:11:13,115 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 17:11:13,115 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 17:11:13,115 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 17:11:13,115 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 17:11:13,115 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 17:11:13,116 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 17:11:13,116 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 17:11:13,116 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 17:11:13,117 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 17:11:13,117 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 17:11:13,118 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 17:11:13,118 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 17:11:13,173 INFO ]: Repository-Root is: /tmp [2018-06-18 17:11:13,188 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 17:11:13,193 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 17:11:13,195 INFO ]: Initializing SmtParser... [2018-06-18 17:11:13,195 INFO ]: SmtParser initialized [2018-06-18 17:11:13,196 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/traffic.smt2 [2018-06-18 17:11:13,197 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 17:11:13,291 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/traffic.smt2 unknown [2018-06-18 17:11:13,488 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/traffic.smt2 [2018-06-18 17:11:13,492 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 17:11:13,498 INFO ]: Walking toolchain with 4 elements. [2018-06-18 17:11:13,498 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 17:11:13,498 INFO ]: Initializing ChcToBoogie... [2018-06-18 17:11:13,498 INFO ]: ChcToBoogie initialized [2018-06-18 17:11:13,505 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,557 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13 Unit [2018-06-18 17:11:13,558 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 17:11:13,558 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 17:11:13,558 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 17:11:13,559 INFO ]: Boogie Preprocessor initialized [2018-06-18 17:11:13,582 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,582 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,593 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,593 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,602 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,604 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,605 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... [2018-06-18 17:11:13,607 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 17:11:13,607 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 17:11:13,607 INFO ]: Initializing RCFGBuilder... [2018-06-18 17:11:13,607 INFO ]: RCFGBuilder initialized [2018-06-18 17:11:13,608 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 17:11:13,635 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 17:11:13,635 INFO ]: Found specification of procedure False [2018-06-18 17:11:13,635 INFO ]: Found implementation of procedure False [2018-06-18 17:11:13,635 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 17:11:13,635 INFO ]: Found specification of procedure state [2018-06-18 17:11:13,635 INFO ]: Found implementation of procedure state [2018-06-18 17:11:13,635 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 17:11:13,635 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 17:11:13,635 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 17:11:13,814 INFO ]: Using library mode [2018-06-18 17:11:13,814 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:11:13 BoogieIcfgContainer [2018-06-18 17:11:13,814 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 17:11:13,815 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 17:11:13,815 INFO ]: Initializing TraceAbstraction... [2018-06-18 17:11:13,818 INFO ]: TraceAbstraction initialized [2018-06-18 17:11:13,818 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:11:13" (1/3) ... [2018-06-18 17:11:13,819 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341ee373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 05:11:13, skipping insertion in model container [2018-06-18 17:11:13,819 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:11:13" (2/3) ... [2018-06-18 17:11:13,819 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341ee373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 05:11:13, skipping insertion in model container [2018-06-18 17:11:13,820 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:11:13" (3/3) ... [2018-06-18 17:11:13,821 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 17:11:13,830 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 17:11:13,837 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 17:11:13,871 INFO ]: Using default assertion order modulation [2018-06-18 17:11:13,871 INFO ]: Interprodecural is true [2018-06-18 17:11:13,871 INFO ]: Hoare is false [2018-06-18 17:11:13,871 INFO ]: Compute interpolants for FPandBP [2018-06-18 17:11:13,871 INFO ]: Backedges is TWOTRACK [2018-06-18 17:11:13,871 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 17:11:13,871 INFO ]: Difference is false [2018-06-18 17:11:13,871 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 17:11:13,871 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 17:11:13,886 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 17:11:13,897 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 17:11:13,897 INFO ]: Found error trace [2018-06-18 17:11:13,898 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:11:13,898 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:11:13,902 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 17:11:13,903 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:11:13,903 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:11:13,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:13,938 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:11:13,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:13,992 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:11:14,004 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:11:14,367 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 8 [2018-06-18 17:11:14,370 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 17:11:14,372 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 17:11:14,372 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 17:11:14,374 INFO ]: Interpolant automaton has 4 states [2018-06-18 17:11:14,384 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 17:11:14,384 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 17:11:14,386 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 17:11:14,454 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:11:14,454 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 17:11:14,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 17:11:14,456 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 17:11:14,456 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:11:14,465 INFO ]: With dead ends: 13 [2018-06-18 17:11:14,465 INFO ]: Without dead ends: 13 [2018-06-18 17:11:14,467 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 17:11:14,480 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 17:11:14,502 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 17:11:14,503 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 17:11:14,504 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 17:11:14,505 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 17:11:14,505 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:11:14,505 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 17:11:14,505 INFO ]: Interpolant automaton has 4 states. [2018-06-18 17:11:14,505 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 17:11:14,506 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 17:11:14,506 INFO ]: Found error trace [2018-06-18 17:11:14,507 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:11:14,507 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:11:14,507 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 17:11:14,507 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:11:14,507 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:11:14,509 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:14,509 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:11:14,509 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:14,560 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:11:14,561 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:11:15,294 WARN ]: Spent 523.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-06-18 17:11:15,476 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2018-06-18 17:11:15,508 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:11:15,508 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:11:15,508 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 17:11:15,516 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:11:15,556 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:11:15,565 INFO ]: Computing forward predicates... [2018-06-18 17:11:19,297 WARN ]: Spent 1.41 s on a formula simplification. DAG size of input: 228 DAG size of output: 33 [2018-06-18 17:11:19,404 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:11:19,438 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:11:19,438 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 17:11:19,439 INFO ]: Interpolant automaton has 8 states [2018-06-18 17:11:19,439 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 17:11:19,439 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-18 17:11:19,439 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 17:11:19,780 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-06-18 17:11:19,945 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:11:19,945 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 17:11:19,946 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 17:11:19,946 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 17:11:19,946 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:11:19,947 INFO ]: With dead ends: 15 [2018-06-18 17:11:19,947 INFO ]: Without dead ends: 15 [2018-06-18 17:11:19,947 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-18 17:11:19,948 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 17:11:19,952 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 17:11:19,952 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 17:11:19,952 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 17:11:19,952 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 17:11:19,952 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:11:19,952 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 17:11:19,952 INFO ]: Interpolant automaton has 8 states. [2018-06-18 17:11:19,953 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 17:11:19,953 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 17:11:19,953 INFO ]: Found error trace [2018-06-18 17:11:19,953 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:11:19,953 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:11:19,953 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 17:11:19,953 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:11:19,953 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:11:19,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:19,954 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:11:19,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:11:20,039 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:11:20,040 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:11:20,506 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 47 [2018-06-18 17:11:20,845 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 17:11:20,845 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:11:20,845 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 17:11:20,864 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 17:11:20,898 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 17:11:20,898 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:11:20,902 INFO ]: Computing forward predicates... [2018-06-18 17:11:20,974 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:11:21,044 WARN ]: Simplifying disjunction of 14976 conjuctions. This might take some time... [2018-06-18 17:11:37,179 INFO ]: Simplified to disjunction of 14976 conjuctions. Received shutdown request... [2018-06-18 17:12:21,460 WARN ]: Removed 1118 from assertion stack [2018-06-18 17:12:21,460 INFO ]: Timeout while computing interpolants [2018-06-18 17:12:21,660 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 17:12:21,661 WARN ]: Verification canceled [2018-06-18 17:12:21,667 WARN ]: Timeout [2018-06-18 17:12:21,667 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 05:12:21 BoogieIcfgContainer [2018-06-18 17:12:21,667 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 17:12:21,668 INFO ]: Toolchain (without parser) took 68175.86 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 262.7 MB in the beginning and 644.3 MB in the end (delta: -381.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 17:12:21,671 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 17:12:21,672 INFO ]: ChcToBoogie took 59.97 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 MB in the beginning and 260.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:12:21,672 INFO ]: Boogie Preprocessor took 48.20 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 259.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-18 17:12:21,673 INFO ]: RCFGBuilder took 207.09 ms. Allocated memory is still 308.3 MB. Free memory was 258.6 MB in the beginning and 250.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:12:21,674 INFO ]: TraceAbstraction took 67851.63 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.6 MB in the beginning and 644.3 MB in the end (delta: -393.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 17:12:21,679 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.97 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 MB in the beginning and 260.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 48.20 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 259.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 207.09 ms. Allocated memory is still 308.3 MB. Free memory was 258.6 MB in the beginning and 250.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67851.63 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.6 MB in the beginning and 644.3 MB in the end (delta: -393.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 2491. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 67.8s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 7 SDslu, 47 SDs, 0 SdLazy, 33 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.0s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 3532 SizeOfPredicates, 19 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/traffic.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_17-12-21-698.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/traffic.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_17-12-21-698.csv Completed graceful shutdown