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_No_Goto.epf -i /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma0.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:23:24,072 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:23:24,075 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:23:24,088 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:23:24,089 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:23:24,090 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:23:24,094 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:23:24,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:23:24,098 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:23:24,099 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:23:24,101 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:23:24,101 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:23:24,102 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:23:24,103 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:23:24,103 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:23:24,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:23:24,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:23:24,113 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:23:24,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:23:24,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:23:24,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:23:24,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:23:24,119 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:23:24,119 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:23:24,120 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:23:24,121 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:23:24,122 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:23:24,122 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:23:24,123 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:23:24,124 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:23:24,124 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:23:24,125 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:23:24,125 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:23:24,126 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:23:24,126 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:23:24,127 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 12:23:24,146 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:23:24,146 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:23:24,146 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:23:24,146 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:23:24,147 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:23:24,148 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:23:24,151 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:23:24,151 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:23:24,152 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:23:24,152 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:23:24,152 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:23:24,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:23:24,152 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:23:24,153 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:23:24,154 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:23:24,155 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:23:24,197 INFO ]: Repository-Root is: /tmp [2018-06-22 12:23:24,212 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:23:24,215 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:23:24,216 INFO ]: Initializing SmtParser... [2018-06-22 12:23:24,216 INFO ]: SmtParser initialized [2018-06-22 12:23:24,217 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma0.smt2 [2018-06-22 12:23:24,219 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 12:23:24,313 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma0.smt2 unknown [2018-06-22 12:23:24,670 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.lemma0.smt2 [2018-06-22 12:23:24,675 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:23:24,681 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:23:24,681 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:23:24,681 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:23:24,681 INFO ]: ChcToBoogie initialized [2018-06-22 12:23:24,685 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,733 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24 Unit [2018-06-22 12:23:24,733 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:23:24,734 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:23:24,734 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:23:24,734 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:23:24,753 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,753 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,764 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,764 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,784 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,785 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,796 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (1/1) ... [2018-06-22 12:23:24,799 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:23:24,800 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:23:24,800 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:23:24,800 INFO ]: RCFGBuilder initialized [2018-06-22 12:23:24,800 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (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 12:23:24,815 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:23:24,815 INFO ]: Found specification of procedure False [2018-06-22 12:23:24,815 INFO ]: Found implementation of procedure False [2018-06-22 12:23:24,815 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:23:24,815 INFO ]: Found specification of procedure invariant [2018-06-22 12:23:24,815 INFO ]: Found implementation of procedure invariant [2018-06-22 12:23:24,816 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:23:24,816 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:23:24,816 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 12:23:25,116 INFO ]: Using library mode [2018-06-22 12:23:25,117 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:23:25 BoogieIcfgContainer [2018-06-22 12:23:25,117 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:23:25,118 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:23:25,118 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:23:25,121 INFO ]: TraceAbstraction initialized [2018-06-22 12:23:25,121 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:23:24" (1/3) ... [2018-06-22 12:23:25,122 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d490c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:23:25, skipping insertion in model container [2018-06-22 12:23:25,122 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:23:24" (2/3) ... [2018-06-22 12:23:25,122 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d490c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:23:25, skipping insertion in model container [2018-06-22 12:23:25,122 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:23:25" (3/3) ... [2018-06-22 12:23:25,124 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:23:25,134 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:23:25,142 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:23:25,190 INFO ]: Using default assertion order modulation [2018-06-22 12:23:25,190 INFO ]: Interprodecural is true [2018-06-22 12:23:25,190 INFO ]: Hoare is false [2018-06-22 12:23:25,190 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:23:25,190 INFO ]: Backedges is TWOTRACK [2018-06-22 12:23:25,190 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:23:25,190 INFO ]: Difference is false [2018-06-22 12:23:25,190 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:23:25,191 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:23:25,207 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:23:25,218 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:23:25,218 INFO ]: Found error trace [2018-06-22 12:23:25,219 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:23:25,219 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:23:25,225 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 12:23:25,227 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:23:25,228 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:23:25,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:25,266 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:23:25,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:25,328 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:23:25,445 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:23:25,446 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:23:25,447 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:23:25,448 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:23:25,458 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:23:25,458 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:23:25,460 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:23:25,532 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:23:25,533 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:23:25,533 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:23:25,534 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:23:25,535 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:23:25,549 INFO ]: With dead ends: 13 [2018-06-22 12:23:25,549 INFO ]: Without dead ends: 13 [2018-06-22 12:23:25,551 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:23:25,565 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:23:25,601 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:23:25,602 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:23:25,602 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:23:25,603 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:23:25,603 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:23:25,603 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:23:25,603 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:23:25,603 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:23:25,604 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:23:25,604 INFO ]: Found error trace [2018-06-22 12:23:25,604 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:23:25,604 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:23:25,605 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 12:23:25,605 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:23:25,605 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:23:25,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:25,605 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:23:25,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:25,718 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:23:26,538 WARN ]: Spent 586.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2018-06-22 12:23:26,762 WARN ]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 12:23:27,014 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-06-22 12:23:27,017 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:23:27,017 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:23:27,017 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) [2018-06-22 12:23:27,040 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:23:27,109 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:23:27,122 INFO ]: Computing forward predicates... [2018-06-22 12:23:28,222 WARN ]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-06-22 12:23:28,374 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:23:28,404 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:23:28,404 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 12:23:28,404 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:23:28,405 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:23:28,405 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:23:28,405 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 12:23:28,752 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2018-06-22 12:23:28,929 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-06-22 12:23:28,964 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:23:28,964 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 12:23:28,965 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:23:28,966 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 12:23:28,966 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:23:28,966 INFO ]: With dead ends: 17 [2018-06-22 12:23:28,966 INFO ]: Without dead ends: 17 [2018-06-22 12:23:28,967 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 12:23:28,967 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 12:23:28,971 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 12:23:28,971 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 12:23:28,998 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 12:23:28,998 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-22 12:23:28,998 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:23:28,998 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 12:23:28,998 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:23:28,998 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 12:23:28,998 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:23:28,998 INFO ]: Found error trace [2018-06-22 12:23:28,998 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:23:28,999 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:23:28,999 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 2 times [2018-06-22 12:23:28,999 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:23:28,999 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:23:28,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:28,999 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:23:28,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:29,133 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:23:30,104 WARN ]: Spent 467.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2018-06-22 12:23:30,235 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:23:30,235 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:23:30,235 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 12:23:30,251 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:23:30,317 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:23:30,317 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:23:30,324 INFO ]: Computing forward predicates... [2018-06-22 12:23:46,088 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2018-06-22 12:23:58,645 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-06-22 12:23:58,768 INFO ]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:23:58,789 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:23:58,789 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 12:23:58,789 INFO ]: Interpolant automaton has 17 states [2018-06-22 12:23:58,789 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 12:23:58,791 INFO ]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-06-22 12:23:58,791 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 12:23:59,102 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2018-06-22 12:23:59,279 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2018-06-22 12:23:59,509 WARN ]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2018-06-22 12:23:59,636 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-06-22 12:23:59,654 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:23:59,654 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 12:23:59,656 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 12:23:59,656 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 12:23:59,656 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:23:59,656 INFO ]: With dead ends: 21 [2018-06-22 12:23:59,656 INFO ]: Without dead ends: 21 [2018-06-22 12:23:59,657 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2018-06-22 12:23:59,657 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 12:23:59,660 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 12:23:59,660 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 12:23:59,661 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 12:23:59,661 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 12:23:59,661 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:23:59,661 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 12:23:59,661 INFO ]: Interpolant automaton has 17 states. [2018-06-22 12:23:59,661 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 12:23:59,662 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:23:59,662 INFO ]: Found error trace [2018-06-22 12:23:59,662 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:23:59,662 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:23:59,662 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 3 times [2018-06-22 12:23:59,663 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:23:59,663 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:23:59,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:59,663 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:23:59,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:23:59,850 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:24:00,577 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 12:24:01,904 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2018-06-22 12:24:02,562 WARN ]: Spent 603.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 92 [2018-06-22 12:24:03,744 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 206 DAG size of output: 99 [2018-06-22 12:24:04,355 WARN ]: Spent 578.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 78 [2018-06-22 12:24:04,762 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 49 [2018-06-22 12:24:04,995 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2018-06-22 12:24:05,199 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2018-06-22 12:24:05,741 WARN ]: Spent 516.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2018-06-22 12:24:05,876 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2018-06-22 12:24:05,915 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 12:24:05,915 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:24:05,915 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 [2018-06-22 12:24:05,931 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:24:06,031 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-22 12:24:06,031 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:24:06,041 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 12:24:31,418 INFO ]: Timeout while computing interpolants [2018-06-22 12:24:31,618 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 12:24:31,619 WARN ]: Verification canceled [2018-06-22 12:24:31,623 WARN ]: Timeout [2018-06-22 12:24:31,623 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:24:31 BoogieIcfgContainer [2018-06-22 12:24:31,623 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:24:31,624 INFO ]: Toolchain (without parser) took 66948.60 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 255.2 MB in the beginning and 1.0 GB in the end (delta: -762.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:24:31,625 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:24:31,625 INFO ]: ChcToBoogie took 52.32 ms. Allocated memory is still 308.8 MB. Free memory was 254.2 MB in the beginning and 252.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:24:31,626 INFO ]: Boogie Preprocessor took 65.23 ms. Allocated memory is still 308.8 MB. Free memory was 252.2 MB in the beginning and 250.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:24:31,626 INFO ]: RCFGBuilder took 317.04 ms. Allocated memory is still 308.8 MB. Free memory was 250.2 MB in the beginning and 235.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 3.6 GB. [2018-06-22 12:24:31,627 INFO ]: TraceAbstraction took 66505.28 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 235.0 MB in the beginning and 1.0 GB in the end (delta: -782.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 12:24:31,629 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.32 ms. Allocated memory is still 308.8 MB. Free memory was 254.2 MB in the beginning and 252.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 65.23 ms. Allocated memory is still 308.8 MB. Free memory was 252.2 MB in the beginning and 250.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 317.04 ms. Allocated memory is still 308.8 MB. Free memory was 250.2 MB in the beginning and 235.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 3.6 GB. * TraceAbstraction took 66505.28 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 235.0 MB in the beginning and 1.0 GB in the end (delta: -782.8 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 30 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 6 quantified variables from 7 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 66.4s OverallTime, 4 OverallIterations, 6 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 23 SDslu, 90 SDs, 0 SdLazy, 78 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 0.3s SatisfiabilityAnalysisTime, 32.2s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 20552 SizeOfPredicates, 138 NumberOfNonLiveVariables, 358 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 17/48 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/lfht_2_mini_cleaned.lemma0.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-24-31-640.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lfht_2_mini_cleaned.lemma0.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-24-31-640.csv Completed graceful shutdown