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/sally-chc-benchmarks/misc/fourslot.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:03:25,059 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:03:25,062 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:03:25,076 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:03:25,078 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:03:25,079 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:03:25,080 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:03:25,084 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:03:25,085 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:03:25,088 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:03:25,088 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:03:25,089 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:03:25,090 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:03:25,091 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:03:25,093 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:03:25,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:03:25,095 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:03:25,106 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:03:25,107 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:03:25,108 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:03:25,109 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:03:25,114 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:03:25,115 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:03:25,115 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:03:25,116 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:03:25,116 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:03:25,119 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:03:25,119 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:03:25,120 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:03:25,120 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:03:25,121 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:03:25,122 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:03:25,125 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:03:25,126 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:03:25,127 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:03:25,127 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:03:25,143 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:03:25,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:03:25,144 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:03:25,144 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:03:25,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:03:25,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:03:25,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:03:25,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:03:25,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:03:25,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:03:25,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:03:25,149 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:03:25,153 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:03:25,153 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:03:25,203 INFO ]: Repository-Root is: /tmp [2018-06-18 12:03:25,219 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:03:25,225 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:03:25,226 INFO ]: Initializing SmtParser... [2018-06-18 12:03:25,227 INFO ]: SmtParser initialized [2018-06-18 12:03:25,227 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-18 12:03:25,228 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 12:03:25,314 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 unknown [2018-06-18 12:03:25,637 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-18 12:03:25,644 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:03:25,650 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:03:25,651 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:03:25,651 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:03:25,651 INFO ]: ChcToBoogie initialized [2018-06-18 12:03:25,659 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,754 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25 Unit [2018-06-18 12:03:25,754 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:03:25,755 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:03:25,755 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:03:25,755 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:03:25,779 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,780 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,794 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,794 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,811 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,812 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,814 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... [2018-06-18 12:03:25,817 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:03:25,826 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:03:25,826 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:03:25,826 INFO ]: RCFGBuilder initialized [2018-06-18 12:03:25,828 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-18 12:03:25,864 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:03:25,864 INFO ]: Found specification of procedure False [2018-06-18 12:03:25,864 INFO ]: Found implementation of procedure False [2018-06-18 12:03:25,864 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-18 12:03:25,864 INFO ]: Found specification of procedure invariant [2018-06-18 12:03:25,864 INFO ]: Found implementation of procedure invariant [2018-06-18 12:03:25,864 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:03:25,864 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:03:25,864 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:03:26,168 INFO ]: Using library mode [2018-06-18 12:03:26,169 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:03:26 BoogieIcfgContainer [2018-06-18 12:03:26,169 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:03:26,171 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:03:26,171 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:03:26,174 INFO ]: TraceAbstraction initialized [2018-06-18 12:03:26,175 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:03:25" (1/3) ... [2018-06-18 12:03:26,176 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4305d8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:03:26, skipping insertion in model container [2018-06-18 12:03:26,176 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:03:25" (2/3) ... [2018-06-18 12:03:26,176 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4305d8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:03:26, skipping insertion in model container [2018-06-18 12:03:26,176 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:03:26" (3/3) ... [2018-06-18 12:03:26,178 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:03:26,189 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:03:26,198 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:03:26,255 INFO ]: Using default assertion order modulation [2018-06-18 12:03:26,256 INFO ]: Interprodecural is true [2018-06-18 12:03:26,256 INFO ]: Hoare is false [2018-06-18 12:03:26,256 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:03:26,256 INFO ]: Backedges is TWOTRACK [2018-06-18 12:03:26,256 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:03:26,256 INFO ]: Difference is false [2018-06-18 12:03:26,256 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:03:26,256 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:03:26,281 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:03:26,304 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:03:26,304 INFO ]: Found error trace [2018-06-18 12:03:26,306 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:03:26,306 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:03:26,312 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 12:03:26,315 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:03:26,315 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:03:26,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:26,370 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:03:26,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:26,437 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:03:26,450 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:03:26,647 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:03:26,650 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:03:26,650 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:03:26,658 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:03:26,675 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:03:26,676 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:03:26,679 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:03:26,832 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:03:26,832 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:03:26,836 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:03:26,837 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:03:26,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:03:26,877 INFO ]: With dead ends: 13 [2018-06-18 12:03:26,877 INFO ]: Without dead ends: 13 [2018-06-18 12:03:26,885 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:03:26,903 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:03:26,930 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:03:26,932 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:03:26,932 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:03:26,934 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:03:26,934 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:03:26,934 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:03:26,934 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:03:26,934 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:03:26,938 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:03:26,938 INFO ]: Found error trace [2018-06-18 12:03:26,938 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:03:26,938 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:03:26,939 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 12:03:26,939 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:03:26,939 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:03:26,940 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:26,940 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:03:26,940 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:27,055 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:03:27,056 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:03:27,544 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-18 12:03:27,549 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:03:27,549 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:03:27,549 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 12:03:27,583 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:03:27,658 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:03:27,676 INFO ]: Computing forward predicates... [2018-06-18 12:03:29,370 WARN ]: Spent 788.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-06-18 12:03:29,423 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:03:29,452 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:03:29,452 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-18 12:03:29,453 INFO ]: Interpolant automaton has 10 states [2018-06-18 12:03:29,454 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-18 12:03:29,454 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-18 12:03:29,454 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-18 12:03:30,132 WARN ]: Spent 438.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-06-18 12:03:30,187 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:03:30,187 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:03:30,190 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:03:30,190 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-18 12:03:30,190 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:03:30,191 INFO ]: With dead ends: 15 [2018-06-18 12:03:30,191 INFO ]: Without dead ends: 15 [2018-06-18 12:03:30,192 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 12:03:30,192 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:03:30,196 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:03:30,196 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:03:30,197 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:03:30,197 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:03:30,197 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:03:30,197 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:03:30,197 INFO ]: Interpolant automaton has 10 states. [2018-06-18 12:03:30,197 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:03:30,200 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:03:30,200 INFO ]: Found error trace [2018-06-18 12:03:30,200 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:03:30,200 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:03:30,200 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 12:03:30,200 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:03:30,200 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:03:30,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:30,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:03:30,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:03:30,386 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:03:30,387 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:03:30,749 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:03:30,750 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:03:30,750 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 12:03:30,764 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:03:30,816 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:03:30,816 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:03:30,821 INFO ]: Computing forward predicates... [2018-06-18 12:03:31,293 WARN ]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-18 12:03:41,460 WARN ]: Spent 3.42 s on a formula simplification. DAG size of input: 183 DAG size of output: 114 [2018-06-18 12:03:48,649 WARN ]: Spent 2.91 s on a formula simplification. DAG size of input: 169 DAG size of output: 113 [2018-06-18 12:03:49,172 WARN ]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 12:03:49,822 WARN ]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-18 12:03:51,129 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-06-18 12:03:51,171 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:03:51,203 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:03:51,203 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-18 12:03:51,204 INFO ]: Interpolant automaton has 14 states [2018-06-18 12:03:51,204 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-18 12:03:51,204 INFO ]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-06-18 12:03:51,204 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-18 12:03:54,886 WARN ]: Spent 3.51 s on a formula simplification. DAG size of input: 197 DAG size of output: 126 [2018-06-18 12:03:55,694 WARN ]: Spent 653.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 47 [2018-06-18 12:03:58,261 WARN ]: Spent 2.37 s on a formula simplification. DAG size of input: 202 DAG size of output: 66 [2018-06-18 12:04:01,169 WARN ]: Spent 2.71 s on a formula simplification. DAG size of input: 200 DAG size of output: 131 [2018-06-18 12:04:01,234 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:04:01,234 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 12:04:01,235 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 12:04:01,235 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-18 12:04:01,235 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:04:01,236 INFO ]: With dead ends: 19 [2018-06-18 12:04:01,236 INFO ]: Without dead ends: 19 [2018-06-18 12:04:01,237 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-06-18 12:04:01,237 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 12:04:01,240 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 12:04:01,241 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 12:04:01,242 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 12:04:01,242 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-18 12:04:01,242 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:04:01,242 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 12:04:01,242 INFO ]: Interpolant automaton has 14 states. [2018-06-18 12:04:01,242 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 12:04:01,243 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 12:04:01,243 INFO ]: Found error trace [2018-06-18 12:04:01,243 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:04:01,243 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:04:01,243 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 3 times [2018-06-18 12:04:01,244 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:04:01,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:04:01,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:04:01,245 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:04:01,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:04:01,396 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:04:01,397 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:04:01,951 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2018-06-18 12:04:02,213 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2018-06-18 12:04:02,486 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:04:02,486 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:04:02,487 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:04:02,504 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:04:02,602 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-18 12:04:02,602 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:04:02,610 INFO ]: Computing forward predicates... [2018-06-18 12:04:06,869 WARN ]: Spent 3.58 s on a formula simplification. DAG size of input: 187 DAG size of output: 128 [2018-06-18 12:04:19,390 WARN ]: Spent 7.32 s on a formula simplification. DAG size of input: 259 DAG size of output: 176 [2018-06-18 12:04:19,772 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2018-06-18 12:04:19,792 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-18 12:04:29,213 WARN ]: Removed 595 from assertion stack [2018-06-18 12:04:29,213 INFO ]: Timeout while computing interpolants [2018-06-18 12:04:29,414 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:04:29,414 WARN ]: Verification canceled [2018-06-18 12:04:29,420 WARN ]: Timeout [2018-06-18 12:04:29,421 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:04:29 BoogieIcfgContainer [2018-06-18 12:04:29,421 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:04:29,422 INFO ]: Toolchain (without parser) took 63776.82 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.2 MB in the beginning and 784.2 MB in the end (delta: -523.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 12:04:29,425 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:04:29,425 INFO ]: ChcToBoogie took 103.55 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 257.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-18 12:04:29,426 INFO ]: Boogie Preprocessor took 61.66 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 12:04:29,426 INFO ]: RCFGBuilder took 342.82 ms. Allocated memory is still 308.8 MB. Free memory was 255.2 MB in the beginning and 245.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 12:04:29,427 INFO ]: TraceAbstraction took 63250.07 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.3 MB in the beginning and 784.2 MB in the end (delta: -538.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-18 12:04:29,443 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 103.55 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 257.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 61.66 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 342.82 ms. Allocated memory is still 308.8 MB. Free memory was 255.2 MB in the beginning and 245.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63250.07 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.3 MB in the beginning and 784.2 MB in the end (delta: -538.9 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 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 811. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 63.1s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 10.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 22 SDslu, 97 SDs, 0 SdLazy, 74 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 20.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 23.1s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 49112 SizeOfPredicates, 84 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/fourslot.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-04-29-462.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-04-29-462.csv Completed graceful shutdown