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/peterson_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:25:16,050 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:25:16,052 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:25:16,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:25:16,066 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:25:16,067 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:25:16,068 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:25:16,072 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:25:16,074 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:25:16,076 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:25:16,077 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:25:16,077 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:25:16,080 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:25:16,081 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:25:16,081 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:25:16,082 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:25:16,095 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:25:16,097 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:25:16,099 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:25:16,100 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:25:16,101 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:25:16,107 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:25:16,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:25:16,108 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:25:16,109 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:25:16,112 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:25:16,113 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:25:16,114 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:25:16,119 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:25:16,119 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:25:16,120 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:25:16,121 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:25:16,121 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:25:16,125 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:25:16,126 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:25:16,126 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:25:16,152 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:25:16,153 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:25:16,153 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:25:16,153 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:25:16,155 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:25:16,158 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:25:16,159 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:25:16,159 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:25:16,159 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:25:16,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:25:16,159 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:25:16,160 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:25:16,160 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:25:16,160 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:25:16,160 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:25:16,160 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:25:16,161 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:25:16,163 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:25:16,163 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:25:16,199 INFO ]: Repository-Root is: /tmp [2018-06-18 16:25:16,214 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:25:16,218 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:25:16,220 INFO ]: Initializing SmtParser... [2018-06-18 16:25:16,220 INFO ]: SmtParser initialized [2018-06-18 16:25:16,221 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 [2018-06-18 16:25:16,222 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 16:25:16,325 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 unknown [2018-06-18 16:25:17,031 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1.smt2 [2018-06-18 16:25:17,036 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:25:17,041 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:25:17,042 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:25:17,042 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:25:17,042 INFO ]: ChcToBoogie initialized [2018-06-18 16:25:17,049 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,167 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17 Unit [2018-06-18 16:25:17,167 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:25:17,168 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:25:17,168 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:25:17,168 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:25:17,192 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,192 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,211 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,212 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,226 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,228 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,233 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (1/1) ... [2018-06-18 16:25:17,241 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:25:17,242 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:25:17,242 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:25:17,242 INFO ]: RCFGBuilder initialized [2018-06-18 16:25:17,243 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (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 16:25:17,257 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:25:17,257 INFO ]: Found specification of procedure False [2018-06-18 16:25:17,257 INFO ]: Found implementation of procedure False [2018-06-18 16:25:17,257 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:25:17,257 INFO ]: Found specification of procedure state [2018-06-18 16:25:17,257 INFO ]: Found implementation of procedure state [2018-06-18 16:25:17,257 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:25:17,257 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:25:17,257 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 16:25:17,935 INFO ]: Using library mode [2018-06-18 16:25:17,936 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:25:17 BoogieIcfgContainer [2018-06-18 16:25:17,936 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:25:17,939 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:25:17,939 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:25:17,943 INFO ]: TraceAbstraction initialized [2018-06-18 16:25:17,945 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:25:17" (1/3) ... [2018-06-18 16:25:17,946 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db98258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:25:17, skipping insertion in model container [2018-06-18 16:25:17,946 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:25:17" (2/3) ... [2018-06-18 16:25:17,946 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db98258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:25:17, skipping insertion in model container [2018-06-18 16:25:17,946 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:25:17" (3/3) ... [2018-06-18 16:25:17,949 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:25:17,959 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:25:17,973 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:25:18,027 INFO ]: Using default assertion order modulation [2018-06-18 16:25:18,028 INFO ]: Interprodecural is true [2018-06-18 16:25:18,028 INFO ]: Hoare is false [2018-06-18 16:25:18,028 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:25:18,028 INFO ]: Backedges is TWOTRACK [2018-06-18 16:25:18,028 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:25:18,028 INFO ]: Difference is false [2018-06-18 16:25:18,028 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:25:18,028 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:25:18,047 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:25:18,069 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:25:18,069 INFO ]: Found error trace [2018-06-18 16:25:18,070 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:25:18,070 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:25:18,076 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:25:18,079 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:25:18,079 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:25:18,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:18,135 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:18,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:18,304 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:18,315 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:25:18,683 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 1 [2018-06-18 16:25:18,686 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:25:18,690 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:25:18,690 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:25:18,692 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:25:18,709 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:25:18,710 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:25:18,712 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:25:18,889 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:25:18,889 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:25:18,891 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:25:18,892 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:25:18,892 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:25:18,907 INFO ]: With dead ends: 13 [2018-06-18 16:25:18,907 INFO ]: Without dead ends: 13 [2018-06-18 16:25:18,911 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 16:25:18,931 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:25:18,956 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:25:18,963 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:25:18,963 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:25:18,965 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:25:18,965 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:25:18,965 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:25:18,965 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:25:18,965 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:25:18,967 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:25:18,967 INFO ]: Found error trace [2018-06-18 16:25:18,967 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:25:18,967 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:25:18,968 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:25:18,968 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:25:18,968 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:25:18,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:18,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:18,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:19,134 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:19,136 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:25:19,977 WARN ]: Spent 531.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2018-06-18 16:25:20,124 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:25:20,125 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:25:20,125 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 16:25:20,142 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:20,398 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:20,416 INFO ]: Computing forward predicates... [2018-06-18 16:25:22,330 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:25:22,354 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:25:22,354 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:25:22,355 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:25:22,355 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:25:22,355 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:25:22,355 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:25:22,705 WARN ]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-06-18 16:25:22,886 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:25:22,886 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:25:22,887 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:25:22,887 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:25:22,887 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:25:22,887 INFO ]: With dead ends: 15 [2018-06-18 16:25:22,888 INFO ]: Without dead ends: 15 [2018-06-18 16:25:22,888 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:25:22,889 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:25:22,892 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:25:22,892 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:25:22,892 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:25:22,892 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:25:22,892 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:25:22,892 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:25:22,892 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:25:22,893 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:25:22,893 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:25:22,893 INFO ]: Found error trace [2018-06-18 16:25:22,893 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:25:22,893 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:25:22,894 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:25:22,894 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:25:22,894 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:25:22,895 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:22,895 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:25:22,895 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:25:23,048 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:23,050 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:25:23,490 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2018-06-18 16:25:23,716 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-06-18 16:25:23,805 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:25:23,806 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:25:23,806 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 16:25:23,812 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:25:24,103 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:25:24,103 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:25:24,113 INFO ]: Computing forward predicates... [2018-06-18 16:25:25,675 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,684 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:25,883 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,891 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,971 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,979 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,988 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:25,991 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:26,333 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:26,341 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:26,427 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:26,433 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:26,525 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:26,532 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,079 WARN ]: expecting exponential blowup for input size 11 [2018-06-18 16:25:28,085 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,087 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,091 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,095 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,116 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,120 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,125 WARN ]: expecting exponential blowup for input size 9 [2018-06-18 16:25:28,145 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,149 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,152 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,156 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,158 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,162 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,169 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,286 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,290 WARN ]: expecting exponential blowup for input size 12 [2018-06-18 16:25:28,293 WARN ]: expecting exponential blowup for input size 12 [2018-06-18 16:25:28,304 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,306 WARN ]: expecting exponential blowup for input size 11 [2018-06-18 16:25:28,307 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,310 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,312 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,315 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 16:25:28,321 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,323 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:25:28,326 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:25:28,327 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-18 16:26:26,492 INFO ]: Timeout while computing interpolants [2018-06-18 16:26:26,693 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:26:26,693 WARN ]: Verification canceled [2018-06-18 16:26:26,697 WARN ]: Timeout [2018-06-18 16:26:26,697 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:26:26 BoogieIcfgContainer [2018-06-18 16:26:26,697 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:26:26,698 INFO ]: Toolchain (without parser) took 69661.21 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 222.2 MB in the beginning and 431.8 MB in the end (delta: -209.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 16:26:26,698 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 304.6 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:26:26,698 INFO ]: ChcToBoogie took 126.32 ms. Allocated memory is still 304.6 MB. Free memory was 221.2 MB in the beginning and 214.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:26,699 INFO ]: Boogie Preprocessor took 72.70 ms. Allocated memory is still 304.6 MB. Free memory was 214.2 MB in the beginning and 212.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:26,699 INFO ]: RCFGBuilder took 694.50 ms. Allocated memory was 304.6 MB in the beginning and 324.0 MB in the end (delta: 19.4 MB). Free memory was 212.2 MB in the beginning and 266.7 MB in the end (delta: -54.5 MB). Peak memory consumption was 34.4 MB. Max. memory is 3.6 GB. [2018-06-18 16:26:26,700 INFO ]: TraceAbstraction took 68757.77 ms. Allocated memory was 324.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 266.7 MB in the beginning and 431.8 MB in the end (delta: -165.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 16:26:26,703 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 304.6 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 126.32 ms. Allocated memory is still 304.6 MB. Free memory was 221.2 MB in the beginning and 214.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 72.70 ms. Allocated memory is still 304.6 MB. Free memory was 214.2 MB in the beginning and 212.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 694.50 ms. Allocated memory was 304.6 MB in the beginning and 324.0 MB in the end (delta: 19.4 MB). Free memory was 212.2 MB in the beginning and 266.7 MB in the end (delta: -54.5 MB). Peak memory consumption was 34.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 68757.77 ms. Allocated memory was 324.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 266.7 MB in the beginning and 431.8 MB in the end (delta: -165.1 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 XnfDer was eliminating 1 quantified variables from 4 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 68.6s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 7 SDslu, 47 SDs, 0 SdLazy, 33 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1524 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1027 ConjunctsInSsa, 20 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/peterson_1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-26-26-716.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/peterson_1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-26-26-716.csv Completed graceful shutdown