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/ex3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 07:31:53,068 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 07:31:53,070 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 07:31:53,084 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 07:31:53,085 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 07:31:53,086 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 07:31:53,087 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 07:31:53,090 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 07:31:53,093 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 07:31:53,093 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 07:31:53,094 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 07:31:53,094 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 07:31:53,095 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 07:31:53,104 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 07:31:53,105 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 07:31:53,106 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 07:31:53,107 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 07:31:53,108 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 07:31:53,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 07:31:53,113 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 07:31:53,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 07:31:53,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 07:31:53,119 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 07:31:53,119 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 07:31:53,120 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 07:31:53,122 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 07:31:53,122 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 07:31:53,123 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 07:31:53,124 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 07:31:53,124 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 07:31:53,127 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 07:31:53,128 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 07:31:53,129 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 07:31:53,130 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 07:31:53,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 07:31:53,131 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 07:31:53,150 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 07:31:53,151 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 07:31:53,152 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 07:31:53,152 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 07:31:53,153 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 07:31:53,153 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 07:31:53,153 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 07:31:53,154 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 07:31:53,154 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 07:31:53,154 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 07:31:53,154 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 07:31:53,154 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 07:31:53,154 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 07:31:53,155 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 07:31:53,155 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 07:31:53,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 07:31:53,156 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 07:31:53,157 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 07:31:53,157 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 07:31:53,214 INFO ]: Repository-Root is: /tmp [2018-06-22 07:31:53,229 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 07:31:53,235 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 07:31:53,237 INFO ]: Initializing SmtParser... [2018-06-22 07:31:53,237 INFO ]: SmtParser initialized [2018-06-22 07:31:53,238 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3.smt2 [2018-06-22 07:31:53,239 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 07:31:53,330 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3.smt2 unknown [2018-06-22 07:31:53,615 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3.smt2 [2018-06-22 07:31:53,619 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 07:31:53,634 INFO ]: Walking toolchain with 4 elements. [2018-06-22 07:31:53,635 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 07:31:53,635 INFO ]: Initializing ChcToBoogie... [2018-06-22 07:31:53,635 INFO ]: ChcToBoogie initialized [2018-06-22 07:31:53,643 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,705 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53 Unit [2018-06-22 07:31:53,705 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 07:31:53,705 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 07:31:53,705 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 07:31:53,705 INFO ]: Boogie Preprocessor initialized [2018-06-22 07:31:53,726 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,727 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,734 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,734 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,740 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,741 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,748 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... [2018-06-22 07:31:53,750 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 07:31:53,760 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 07:31:53,760 INFO ]: Initializing RCFGBuilder... [2018-06-22 07:31:53,760 INFO ]: RCFGBuilder initialized [2018-06-22 07:31:53,761 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 07:31:53,779 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 07:31:53,779 INFO ]: Found specification of procedure gotoProc [2018-06-22 07:31:53,779 INFO ]: Found implementation of procedure gotoProc [2018-06-22 07:31:53,779 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 07:31:53,779 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 07:31:53,779 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 07:31:54,091 INFO ]: Using library mode [2018-06-22 07:31:54,091 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:31:54 BoogieIcfgContainer [2018-06-22 07:31:54,091 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 07:31:54,096 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 07:31:54,096 INFO ]: Initializing TraceAbstraction... [2018-06-22 07:31:54,101 INFO ]: TraceAbstraction initialized [2018-06-22 07:31:54,101 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:31:53" (1/3) ... [2018-06-22 07:31:54,102 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd29596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:31:54, skipping insertion in model container [2018-06-22 07:31:54,102 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:53" (2/3) ... [2018-06-22 07:31:54,102 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd29596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:31:54, skipping insertion in model container [2018-06-22 07:31:54,102 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:31:54" (3/3) ... [2018-06-22 07:31:54,104 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 07:31:54,114 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 07:31:54,124 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 07:31:54,169 INFO ]: Using default assertion order modulation [2018-06-22 07:31:54,169 INFO ]: Interprodecural is true [2018-06-22 07:31:54,169 INFO ]: Hoare is false [2018-06-22 07:31:54,169 INFO ]: Compute interpolants for FPandBP [2018-06-22 07:31:54,169 INFO ]: Backedges is TWOTRACK [2018-06-22 07:31:54,169 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 07:31:54,169 INFO ]: Difference is false [2018-06-22 07:31:54,170 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 07:31:54,170 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 07:31:54,186 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 07:31:54,201 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 07:31:54,201 INFO ]: Found error trace [2018-06-22 07:31:54,202 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:54,202 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:54,208 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 07:31:54,210 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:54,211 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:54,253 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:54,254 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:54,254 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:54,328 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:54,419 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:54,421 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 07:31:54,421 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 07:31:54,422 INFO ]: Interpolant automaton has 3 states [2018-06-22 07:31:54,432 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 07:31:54,433 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 07:31:54,434 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 07:31:54,501 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:54,503 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 07:31:54,503 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 07:31:54,505 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 07:31:54,505 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:54,514 INFO ]: With dead ends: 9 [2018-06-22 07:31:54,514 INFO ]: Without dead ends: 9 [2018-06-22 07:31:54,519 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 07:31:54,532 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 07:31:54,556 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 07:31:54,557 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 07:31:54,558 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 07:31:54,559 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 07:31:54,559 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:54,559 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 07:31:54,559 INFO ]: Interpolant automaton has 3 states. [2018-06-22 07:31:54,559 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 07:31:54,559 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 07:31:54,559 INFO ]: Found error trace [2018-06-22 07:31:54,559 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:54,560 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:54,560 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 07:31:54,560 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:54,560 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:54,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:54,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:54,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:54,607 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:54,744 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:54,744 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:54,744 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 07:31:54,761 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:54,882 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:54,891 INFO ]: Computing forward predicates... [2018-06-22 07:31:55,109 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:55,130 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:55,130 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 07:31:55,130 INFO ]: Interpolant automaton has 5 states [2018-06-22 07:31:55,130 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 07:31:55,130 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 07:31:55,130 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 07:31:55,206 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:55,206 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 07:31:55,206 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 07:31:55,207 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 07:31:55,207 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:55,207 INFO ]: With dead ends: 10 [2018-06-22 07:31:55,207 INFO ]: Without dead ends: 10 [2018-06-22 07:31:55,208 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 07:31:55,208 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 07:31:55,209 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 07:31:55,209 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 07:31:55,209 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 07:31:55,209 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 07:31:55,209 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:55,209 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 07:31:55,210 INFO ]: Interpolant automaton has 5 states. [2018-06-22 07:31:55,210 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 07:31:55,210 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 07:31:55,210 INFO ]: Found error trace [2018-06-22 07:31:55,210 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:55,210 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:55,210 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 07:31:55,210 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:55,210 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:55,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:55,212 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:55,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:55,274 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:55,646 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 07:31:55,705 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:55,705 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:55,705 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 07:31:55,712 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 07:31:55,821 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 07:31:55,821 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:55,826 INFO ]: Computing forward predicates... [2018-06-22 07:31:57,273 WARN ]: Spent 834.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-22 07:31:58,321 WARN ]: Spent 292.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 27 [2018-06-22 07:31:58,333 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:58,354 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:58,354 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 07:31:58,354 INFO ]: Interpolant automaton has 8 states [2018-06-22 07:31:58,354 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 07:31:58,354 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 07:31:58,355 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 07:31:58,541 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-06-22 07:31:58,548 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:58,548 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-22 07:31:58,548 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 07:31:58,548 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 07:31:58,548 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:58,548 INFO ]: With dead ends: 6 [2018-06-22 07:31:58,548 INFO ]: Without dead ends: 0 [2018-06-22 07:31:58,549 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-22 07:31:58,549 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 07:31:58,549 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 07:31:58,549 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 07:31:58,549 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 07:31:58,549 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-22 07:31:58,549 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:58,549 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 07:31:58,549 INFO ]: Interpolant automaton has 8 states. [2018-06-22 07:31:58,549 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 07:31:58,549 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 07:31:58,553 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:31:58 BoogieIcfgContainer [2018-06-22 07:31:58,554 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 07:31:58,554 INFO ]: Toolchain (without parser) took 4934.36 ms. Allocated memory was 304.6 MB in the beginning and 384.8 MB in the end (delta: 80.2 MB). Free memory was 257.0 MB in the beginning and 338.2 MB in the end (delta: -81.2 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 07:31:58,555 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 07:31:58,555 INFO ]: ChcToBoogie took 70.35 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 254.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:58,556 INFO ]: Boogie Preprocessor took 45.12 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 07:31:58,556 INFO ]: RCFGBuilder took 331.60 ms. Allocated memory is still 304.6 MB. Free memory was 253.0 MB in the beginning and 239.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:58,557 INFO ]: TraceAbstraction took 4457.61 ms. Allocated memory was 304.6 MB in the beginning and 384.8 MB in the end (delta: 80.2 MB). Free memory was 239.0 MB in the beginning and 338.2 MB in the end (delta: -99.3 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 07:31:58,562 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.35 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 254.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.12 ms. Allocated memory is still 304.6 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 331.60 ms. Allocated memory is still 304.6 MB. Free memory was 253.0 MB in the beginning and 239.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4457.61 ms. Allocated memory was 304.6 MB in the beginning and 384.8 MB in the end (delta: 80.2 MB). Free memory was 239.0 MB in the beginning and 338.2 MB in the end (delta: -99.3 MB). There was no memory consumed. 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, 4.3s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 25 SDs, 0 SdLazy, 19 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1631 SizeOfPredicates, 12 NumberOfNonLiveVariables, 439 ConjunctsInSsa, 74 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/ex3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_07-31-58-574.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_07-31-58-574.csv Received shutdown request...