java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:21:18,017 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:21:18,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:21:18,035 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:21:18,035 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:21:18,037 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:21:18,038 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:21:18,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:21:18,041 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:21:18,043 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:21:18,044 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:21:18,044 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:21:18,045 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:21:18,047 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:21:18,048 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:21:18,049 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:21:18,050 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:21:18,060 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:21:18,062 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:21:18,063 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:21:18,064 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:21:18,067 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:21:18,067 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:21:18,067 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:21:18,068 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:21:18,069 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:21:18,070 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:21:18,071 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:21:18,072 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:21:18,072 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:21:18,073 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:21:18,073 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:21:18,073 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:21:18,074 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:21:18,075 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:21:18,075 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:21:18,099 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:21:18,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:21:18,099 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:21:18,100 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:21:18,102 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:21:18,103 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:21:18,103 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:21:18,103 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:21:18,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:21:18,103 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:21:18,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:21:18,105 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:21:18,106 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:21:18,106 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:21:18,160 INFO ]: Repository-Root is: /tmp [2018-06-18 13:21:18,178 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:21:18,184 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:21:18,185 INFO ]: Initializing SmtParser... [2018-06-18 13:21:18,186 INFO ]: SmtParser initialized [2018-06-18 13:21:18,186 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 [2018-06-18 13:21:18,187 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 13:21:18,255 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 unknown [2018-06-18 13:21:18,512 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulv.c.smt2 [2018-06-18 13:21:18,517 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:21:18,522 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:21:18,522 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:21:18,522 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:21:18,522 INFO ]: ChcToBoogie initialized [2018-06-18 13:21:18,529 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,610 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18 Unit [2018-06-18 13:21:18,610 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:21:18,611 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:21:18,611 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:21:18,611 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:21:18,633 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,633 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,641 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,641 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,647 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,648 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,650 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (1/1) ... [2018-06-18 13:21:18,652 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:21:18,653 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:21:18,653 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:21:18,653 INFO ]: RCFGBuilder initialized [2018-06-18 13:21:18,654 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (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 13:21:18,692 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:21:18,692 INFO ]: Found specification of procedure False [2018-06-18 13:21:18,692 INFO ]: Found implementation of procedure False [2018-06-18 13:21:18,692 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:21:18,692 INFO ]: Found specification of procedure state [2018-06-18 13:21:18,692 INFO ]: Found implementation of procedure state [2018-06-18 13:21:18,692 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:21:18,692 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:21:18,692 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 13:21:19,029 INFO ]: Using library mode [2018-06-18 13:21:19,030 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:21:19 BoogieIcfgContainer [2018-06-18 13:21:19,030 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:21:19,031 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:21:19,031 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:21:19,034 INFO ]: TraceAbstraction initialized [2018-06-18 13:21:19,035 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:21:18" (1/3) ... [2018-06-18 13:21:19,042 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304db232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:21:19, skipping insertion in model container [2018-06-18 13:21:19,043 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:21:18" (2/3) ... [2018-06-18 13:21:19,043 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304db232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:21:19, skipping insertion in model container [2018-06-18 13:21:19,043 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:21:19" (3/3) ... [2018-06-18 13:21:19,045 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:21:19,054 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:21:19,063 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:21:19,109 INFO ]: Using default assertion order modulation [2018-06-18 13:21:19,110 INFO ]: Interprodecural is true [2018-06-18 13:21:19,110 INFO ]: Hoare is false [2018-06-18 13:21:19,110 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:21:19,110 INFO ]: Backedges is TWOTRACK [2018-06-18 13:21:19,110 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:21:19,110 INFO ]: Difference is false [2018-06-18 13:21:19,110 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:21:19,111 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:21:19,130 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:21:19,141 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:21:19,141 INFO ]: Found error trace [2018-06-18 13:21:19,142 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:21:19,142 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:21:19,147 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 13:21:19,149 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:21:19,151 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:21:19,188 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:19,188 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:21:19,188 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:19,214 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:19,221 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:21:19,272 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:21:19,274 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:21:19,274 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:21:19,275 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:21:19,286 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:21:19,287 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:21:19,289 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:21:19,367 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:21:19,368 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:21:19,368 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:21:19,369 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:21:19,370 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:21:19,384 INFO ]: With dead ends: 13 [2018-06-18 13:21:19,384 INFO ]: Without dead ends: 13 [2018-06-18 13:21:19,389 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 [2018-06-18 13:21:19,403 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:21:19,422 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:21:19,423 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:21:19,424 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:21:19,425 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:21:19,425 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:21:19,426 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:21:19,426 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:21:19,426 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:21:19,427 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:21:19,427 INFO ]: Found error trace [2018-06-18 13:21:19,427 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:21:19,427 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:21:19,427 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 13:21:19,428 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:21:19,428 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:21:19,428 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:19,429 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:21:19,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:19,480 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:19,481 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:21:19,770 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:21:19,771 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:21:19,771 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 13:21:19,779 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:21:19,823 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:19,833 INFO ]: Computing forward predicates... [2018-06-18 13:21:20,432 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:21:20,465 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:21:20,466 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:21:20,466 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:21:20,466 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:21:20,467 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:21:20,467 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:21:20,907 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 13:21:21,060 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:21:21,061 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:21:21,062 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:21:21,063 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:21:21,063 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:21:21,063 INFO ]: With dead ends: 15 [2018-06-18 13:21:21,063 INFO ]: Without dead ends: 15 [2018-06-18 13:21:21,064 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-18 13:21:21,065 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:21:21,069 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:21:21,069 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:21:21,069 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:21:21,069 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:21:21,070 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:21:21,070 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:21:21,070 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:21:21,070 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:21:21,070 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:21:21,070 INFO ]: Found error trace [2018-06-18 13:21:21,070 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:21:21,070 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:21:21,071 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 13:21:21,071 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:21:21,071 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:21:21,073 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:21,073 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:21:21,073 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:21,167 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:21,168 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:21:21,482 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-18 13:21:21,637 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:21:21,638 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:21:21,638 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 13:21:21,651 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:21:21,717 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:21:21,717 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:21,720 INFO ]: Computing forward predicates... [2018-06-18 13:21:22,226 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:21:22,246 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:21:22,246 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:21:22,246 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:21:22,246 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:21:22,247 INFO ]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:21:22,247 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:21:22,453 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:21:22,453 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:21:22,453 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:21:22,453 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:21:22,454 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:21:22,454 INFO ]: With dead ends: 17 [2018-06-18 13:21:22,454 INFO ]: Without dead ends: 17 [2018-06-18 13:21:22,455 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-06-18 13:21:22,455 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:21:22,457 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:21:22,458 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:21:22,458 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:21:22,458 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:21:22,458 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:21:22,458 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:21:22,458 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:21:22,459 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:21:22,459 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:21:22,459 INFO ]: Found error trace [2018-06-18 13:21:22,459 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:21:22,459 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:21:22,460 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 13:21:22,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:21:22,460 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:21:22,460 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:22,461 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:21:22,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:22,509 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:22,510 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:21:22,765 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-18 13:21:23,128 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:21:23,128 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:21:23,128 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 13:21:23,147 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:21:23,182 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:21:23,182 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:23,185 INFO ]: Computing forward predicates... [2018-06-18 13:21:23,539 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2018-06-18 13:21:24,069 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:21:24,103 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:21:24,103 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 13:21:24,103 INFO ]: Interpolant automaton has 17 states [2018-06-18 13:21:24,103 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 13:21:24,103 INFO ]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:21:24,104 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 13:21:24,635 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:21:24,635 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:21:24,635 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:21:24,635 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 13:21:24,636 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:21:24,636 INFO ]: With dead ends: 19 [2018-06-18 13:21:24,636 INFO ]: Without dead ends: 19 [2018-06-18 13:21:24,637 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2018-06-18 13:21:24,637 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:21:24,640 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:21:24,640 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:21:24,640 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:21:24,640 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:21:24,641 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:21:24,641 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:21:24,641 INFO ]: Interpolant automaton has 17 states. [2018-06-18 13:21:24,641 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:21:24,641 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:21:24,641 INFO ]: Found error trace [2018-06-18 13:21:24,641 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:21:24,642 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:21:24,642 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 13:21:24,642 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:21:24,642 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:21:24,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:24,642 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:21:24,643 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:21:24,694 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:24,695 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:21:24,973 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-06-18 13:21:25,401 WARN ]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-18 13:21:25,599 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-06-18 13:21:25,611 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:21:25,611 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:21:25,611 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:21:25,617 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 13:21:25,663 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:21:25,663 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:21:25,667 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 13:22:28,463 WARN ]: Removed 13 from assertion stack [2018-06-18 13:22:28,463 INFO ]: Timeout while computing interpolants [2018-06-18 13:22:28,664 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:22:28,664 WARN ]: Verification canceled [2018-06-18 13:22:28,668 WARN ]: Timeout [2018-06-18 13:22:28,668 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:22:28 BoogieIcfgContainer [2018-06-18 13:22:28,668 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:22:28,669 INFO ]: Toolchain (without parser) took 70151.54 ms. Allocated memory was 302.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 254.4 MB in the beginning and 732.4 MB in the end (delta: -478.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 13:22:28,670 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:22:28,670 INFO ]: ChcToBoogie took 88.69 ms. Allocated memory is still 302.0 MB. Free memory was 253.4 MB in the beginning and 250.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:22:28,671 INFO ]: Boogie Preprocessor took 41.10 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 249.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 13:22:28,673 INFO ]: RCFGBuilder took 377.14 ms. Allocated memory is still 302.0 MB. Free memory was 249.4 MB in the beginning and 238.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:22:28,673 INFO ]: TraceAbstraction took 69636.96 ms. Allocated memory was 302.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 238.4 MB in the beginning and 732.4 MB in the end (delta: -494.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 13:22:28,676 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 88.69 ms. Allocated memory is still 302.0 MB. Free memory was 253.4 MB in the beginning and 250.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.10 ms. Allocated memory is still 302.0 MB. Free memory was 250.4 MB in the beginning and 249.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 377.14 ms. Allocated memory is still 302.0 MB. Free memory was 249.4 MB in the beginning and 238.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69636.96 ms. Allocated memory was 302.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 238.4 MB in the beginning and 732.4 MB in the end (delta: -494.0 MB). Peak memory consumption was 1.1 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 9090. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 69.5s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 48 SDslu, 135 SDs, 0 SdLazy, 101 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=4, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 10436 SizeOfPredicates, 82 NumberOfNonLiveVariables, 381 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/gulv.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-22-28-688.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulv.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-22-28-688.csv Completed graceful shutdown