java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_4_e7_1775_e7_3320.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 10:17:43,901 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 10:17:43,902 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 10:17:43,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 10:17:43,915 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 10:17:43,917 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 10:17:43,918 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 10:17:43,922 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 10:17:43,923 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 10:17:43,925 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 10:17:43,926 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 10:17:43,926 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 10:17:43,927 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 10:17:43,928 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 10:17:43,932 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 10:17:43,933 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 10:17:43,934 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 10:17:43,947 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 10:17:43,948 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 10:17:43,949 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 10:17:43,950 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 10:17:43,952 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 10:17:43,952 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 10:17:43,952 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 10:17:43,953 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 10:17:43,954 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 10:17:43,955 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 10:17:43,955 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 10:17:43,956 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 10:17:43,956 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 10:17:43,957 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 10:17:43,957 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 10:17:43,958 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 10:17:43,958 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 10:17:43,959 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 10:17:43,959 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 10:17:43,972 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 10:17:43,972 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 10:17:43,972 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 10:17:43,972 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 10:17:43,973 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 10:17:43,973 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 10:17:43,974 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 10:17:43,974 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 10:17:43,974 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 10:17:43,974 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 10:17:43,974 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 10:17:43,975 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 10:17:43,977 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 10:17:43,977 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 10:17:44,018 INFO ]: Repository-Root is: /tmp [2018-06-22 10:17:44,033 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 10:17:44,038 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 10:17:44,039 INFO ]: Initializing SmtParser... [2018-06-22 10:17:44,039 INFO ]: SmtParser initialized [2018-06-22 10:17:44,041 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_4_e7_1775_e7_3320.smt2 [2018-06-22 10:17:44,042 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 10:17:44,132 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_4_e7_1775_e7_3320.smt2 unknown [2018-06-22 10:17:44,674 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_4_e7_1775_e7_3320.smt2 [2018-06-22 10:17:44,684 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 10:17:44,698 INFO ]: Walking toolchain with 4 elements. [2018-06-22 10:17:44,698 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 10:17:44,698 INFO ]: Initializing ChcToBoogie... [2018-06-22 10:17:44,698 INFO ]: ChcToBoogie initialized [2018-06-22 10:17:44,702 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,832 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44 Unit [2018-06-22 10:17:44,833 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 10:17:44,833 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 10:17:44,833 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 10:17:44,833 INFO ]: Boogie Preprocessor initialized [2018-06-22 10:17:44,856 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,856 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,868 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,868 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,879 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,880 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,883 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (1/1) ... [2018-06-22 10:17:44,898 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 10:17:44,900 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 10:17:44,900 INFO ]: Initializing RCFGBuilder... [2018-06-22 10:17:44,900 INFO ]: RCFGBuilder initialized [2018-06-22 10:17:44,901 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (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 [2018-06-22 10:17:44,912 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 10:17:44,913 INFO ]: Found specification of procedure gotoProc [2018-06-22 10:17:44,913 INFO ]: Found implementation of procedure gotoProc [2018-06-22 10:17:44,913 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 10:17:44,913 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 10:17:44,913 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 10:17:45,414 INFO ]: Using library mode [2018-06-22 10:17:45,414 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:17:45 BoogieIcfgContainer [2018-06-22 10:17:45,414 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 10:17:45,416 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 10:17:45,416 INFO ]: Initializing TraceAbstraction... [2018-06-22 10:17:45,423 INFO ]: TraceAbstraction initialized [2018-06-22 10:17:45,423 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 10:17:44" (1/3) ... [2018-06-22 10:17:45,424 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed40f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 10:17:45, skipping insertion in model container [2018-06-22 10:17:45,424 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:17:44" (2/3) ... [2018-06-22 10:17:45,424 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed40f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 10:17:45, skipping insertion in model container [2018-06-22 10:17:45,424 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:17:45" (3/3) ... [2018-06-22 10:17:45,426 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 10:17:45,435 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 10:17:45,444 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 10:17:45,525 INFO ]: Using default assertion order modulation [2018-06-22 10:17:45,525 INFO ]: Interprodecural is true [2018-06-22 10:17:45,525 INFO ]: Hoare is false [2018-06-22 10:17:45,525 INFO ]: Compute interpolants for FPandBP [2018-06-22 10:17:45,526 INFO ]: Backedges is TWOTRACK [2018-06-22 10:17:45,526 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 10:17:45,526 INFO ]: Difference is false [2018-06-22 10:17:45,526 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 10:17:45,526 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 10:17:45,544 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 10:17:45,558 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 10:17:45,558 INFO ]: Found error trace [2018-06-22 10:17:45,559 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:17:45,559 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:17:45,565 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 10:17:45,566 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:17:45,567 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:17:45,600 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:45,600 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:17:45,600 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:45,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:17:46,055 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 10:17:46,057 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:17:46,059 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 10:17:46,059 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 10:17:46,061 INFO ]: Interpolant automaton has 3 states [2018-06-22 10:17:46,076 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 10:17:46,076 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 10:17:46,078 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 10:17:46,166 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:17:46,166 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 10:17:46,168 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 10:17:46,169 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 10:17:46,170 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:17:46,178 INFO ]: With dead ends: 9 [2018-06-22 10:17:46,178 INFO ]: Without dead ends: 9 [2018-06-22 10:17:46,180 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 10:17:46,198 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 10:17:46,228 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 10:17:46,231 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 10:17:46,231 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 10:17:46,232 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 10:17:46,232 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:17:46,232 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 10:17:46,233 INFO ]: Interpolant automaton has 3 states. [2018-06-22 10:17:46,233 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 10:17:46,233 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 10:17:46,233 INFO ]: Found error trace [2018-06-22 10:17:46,233 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:17:46,233 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:17:46,233 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 10:17:46,233 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:17:46,233 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:17:46,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:46,235 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:17:46,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:46,358 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:17:46,687 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 7 [2018-06-22 10:17:46,894 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2018-06-22 10:17:46,895 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:17:46,895 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:17:46,895 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 10:17:46,901 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:17:47,089 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:17:47,105 INFO ]: Computing forward predicates... [2018-06-22 10:17:47,579 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 10:17:48,962 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2018-06-22 10:17:48,965 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:17:48,987 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:17:48,987 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 10:17:48,987 INFO ]: Interpolant automaton has 6 states [2018-06-22 10:17:48,987 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 10:17:48,987 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 10:17:48,988 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 10:17:49,176 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:17:49,177 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 10:17:49,178 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 10:17:49,178 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 10:17:49,178 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:17:49,178 INFO ]: With dead ends: 10 [2018-06-22 10:17:49,178 INFO ]: Without dead ends: 10 [2018-06-22 10:17:49,179 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 10:17:49,179 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 10:17:49,180 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 10:17:49,181 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 10:17:49,181 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 10:17:49,181 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 10:17:49,181 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:17:49,181 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 10:17:49,181 INFO ]: Interpolant automaton has 6 states. [2018-06-22 10:17:49,181 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 10:17:49,181 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 10:17:49,181 INFO ]: Found error trace [2018-06-22 10:17:49,181 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:17:49,182 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:17:49,182 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 10:17:49,182 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:17:49,182 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:17:49,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:49,183 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:17:49,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:17:49,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:17:49,654 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 7 [2018-06-22 10:17:49,887 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-06-22 10:17:50,417 WARN ]: Spent 454.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2018-06-22 10:17:50,418 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:17:50,418 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:17:50,418 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 10:17:50,424 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 10:17:50,639 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 10:17:50,639 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:17:50,680 INFO ]: Computing forward predicates... [2018-06-22 10:17:50,925 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 10:17:51,005 WARN ]: expecting exponential blowup for input size 11 [2018-06-22 10:17:54,869 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 18 [2018-06-22 10:17:55,253 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 10:17:55,411 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 10:17:55,450 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 10:17:57,185 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:17:57,206 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:17:57,206 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 10:17:57,206 INFO ]: Interpolant automaton has 8 states [2018-06-22 10:17:57,206 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 10:17:57,207 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 10:17:57,207 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 10:17:57,339 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2018-06-22 10:17:57,355 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:17:57,355 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-22 10:17:57,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 10:17:57,357 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 10:17:57,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:17:57,357 INFO ]: With dead ends: 6 [2018-06-22 10:17:57,357 INFO ]: Without dead ends: 0 [2018-06-22 10:17:57,357 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-22 10:17:57,357 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 10:17:57,357 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 10:17:57,357 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 10:17:57,357 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 10:17:57,357 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-22 10:17:57,357 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:17:57,357 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 10:17:57,357 INFO ]: Interpolant automaton has 8 states. [2018-06-22 10:17:57,357 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 10:17:57,357 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 10:17:57,364 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 10:17:57 BoogieIcfgContainer [2018-06-22 10:17:57,364 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 10:17:57,365 INFO ]: Toolchain (without parser) took 12680.03 ms. Allocated memory was 299.9 MB in the beginning and 713.6 MB in the end (delta: 413.7 MB). Free memory was 232.3 MB in the beginning and 419.0 MB in the end (delta: -186.7 MB). Peak memory consumption was 226.9 MB. Max. memory is 3.6 GB. [2018-06-22 10:17:57,365 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 299.9 MB. Free memory is still 265.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 10:17:57,366 INFO ]: ChcToBoogie took 134.67 ms. Allocated memory is still 299.9 MB. Free memory was 232.3 MB in the beginning and 229.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:17:57,366 INFO ]: Boogie Preprocessor took 64.91 ms. Allocated memory is still 299.9 MB. Free memory was 229.3 MB in the beginning and 227.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:17:57,366 INFO ]: RCFGBuilder took 514.51 ms. Allocated memory is still 299.9 MB. Free memory was 227.3 MB in the beginning and 184.4 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:17:57,368 INFO ]: TraceAbstraction took 11947.76 ms. Allocated memory was 299.9 MB in the beginning and 713.6 MB in the end (delta: 413.7 MB). Free memory was 184.4 MB in the beginning and 419.0 MB in the end (delta: -234.7 MB). Peak memory consumption was 179.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:17:57,371 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 299.9 MB. Free memory is still 265.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 134.67 ms. Allocated memory is still 299.9 MB. Free memory was 232.3 MB in the beginning and 229.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 64.91 ms. Allocated memory is still 299.9 MB. Free memory was 229.3 MB in the beginning and 227.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 514.51 ms. Allocated memory is still 299.9 MB. Free memory was 227.3 MB in the beginning and 184.4 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 11947.76 ms. Allocated memory was 299.9 MB in the beginning and 713.6 MB in the end (delta: 413.7 MB). Free memory was 184.4 MB in the beginning and 419.0 MB in the end (delta: -234.7 MB). Peak memory consumption was 179.0 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 2 procedures, 10 locations, 1 error locations. SAFE Result, 11.8s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 32 SDs, 0 SdLazy, 24 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1138 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1884 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/ticket3i_4_e7_1775_e7_3320.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_10-17-57-383.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ticket3i_4_e7_1775_e7_3320.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_10-17-57-383.csv Received shutdown request...