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/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:59:03,056 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:59:03,057 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:59:03,072 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:59:03,072 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:59:03,074 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:59:03,075 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:59:03,077 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:59:03,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:59:03,079 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:59:03,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:59:03,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:59:03,082 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:59:03,083 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:59:03,084 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:59:03,086 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:59:03,088 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:59:03,097 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:59:03,098 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:59:03,099 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:59:03,100 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:59:03,105 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:59:03,106 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:59:03,106 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:59:03,108 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:59:03,109 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:59:03,110 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:59:03,110 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:59:03,113 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:59:03,113 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:59:03,113 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:59:03,114 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:59:03,114 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:59:03,115 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:59:03,115 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:59:03,116 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 14:59:03,138 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:59:03,138 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:59:03,139 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:59:03,139 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:59:03,140 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:59:03,140 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:59:03,141 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:59:03,141 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:59:03,141 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:59:03,141 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:59:03,141 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:59:03,141 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:59:03,142 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:59:03,143 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:59:03,145 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:59:03,145 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:59:03,192 INFO ]: Repository-Root is: /tmp [2018-06-22 14:59:03,208 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:59:03,212 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:59:03,213 INFO ]: Initializing SmtParser... [2018-06-22 14:59:03,213 INFO ]: SmtParser initialized [2018-06-22 14:59:03,214 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 [2018-06-22 14:59:03,216 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 14:59:03,303 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 unknown [2018-06-22 14:59:03,501 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 [2018-06-22 14:59:03,506 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:59:03,512 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:59:03,513 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:59:03,513 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:59:03,513 INFO ]: ChcToBoogie initialized [2018-06-22 14:59:03,516 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,557 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03 Unit [2018-06-22 14:59:03,558 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:59:03,558 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:59:03,558 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:59:03,558 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:59:03,584 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,584 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,597 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,598 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,601 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,607 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,609 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (1/1) ... [2018-06-22 14:59:03,617 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:59:03,617 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:59:03,617 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:59:03,617 INFO ]: RCFGBuilder initialized [2018-06-22 14:59:03,618 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (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 14:59:03,637 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:59:03,637 INFO ]: Found specification of procedure False [2018-06-22 14:59:03,638 INFO ]: Found implementation of procedure False [2018-06-22 14:59:03,638 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:59:03,638 INFO ]: Found specification of procedure state [2018-06-22 14:59:03,638 INFO ]: Found implementation of procedure state [2018-06-22 14:59:03,638 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:59:03,638 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:59:03,638 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 14:59:03,903 INFO ]: Using library mode [2018-06-22 14:59:03,903 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:59:03 BoogieIcfgContainer [2018-06-22 14:59:03,903 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:59:03,905 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:59:03,905 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:59:03,908 INFO ]: TraceAbstraction initialized [2018-06-22 14:59:03,908 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:59:03" (1/3) ... [2018-06-22 14:59:03,909 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390728b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:59:03, skipping insertion in model container [2018-06-22 14:59:03,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:59:03" (2/3) ... [2018-06-22 14:59:03,909 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390728b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:59:03, skipping insertion in model container [2018-06-22 14:59:03,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:59:03" (3/3) ... [2018-06-22 14:59:03,919 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:59:03,931 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:59:03,939 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:59:03,987 INFO ]: Using default assertion order modulation [2018-06-22 14:59:03,988 INFO ]: Interprodecural is true [2018-06-22 14:59:03,988 INFO ]: Hoare is false [2018-06-22 14:59:03,988 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:59:03,988 INFO ]: Backedges is TWOTRACK [2018-06-22 14:59:03,988 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:59:03,988 INFO ]: Difference is false [2018-06-22 14:59:03,988 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:59:03,988 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:59:04,005 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:59:04,015 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:59:04,015 INFO ]: Found error trace [2018-06-22 14:59:04,016 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:59:04,017 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:59:04,020 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:59:04,022 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:59:04,022 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:59:04,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:04,056 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:59:04,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:04,089 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:04,179 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:59:04,181 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:59:04,181 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:59:04,182 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:59:04,197 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:59:04,197 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:59:04,199 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:59:04,267 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:59:04,267 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:59:04,268 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:59:04,268 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:59:04,269 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:59:04,277 INFO ]: With dead ends: 13 [2018-06-22 14:59:04,277 INFO ]: Without dead ends: 13 [2018-06-22 14:59:04,279 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 14:59:04,292 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:59:04,311 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:59:04,312 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:59:04,313 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:59:04,314 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:59:04,314 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:59:04,315 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:59:04,315 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:59:04,315 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:59:04,316 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:59:04,316 INFO ]: Found error trace [2018-06-22 14:59:04,316 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:59:04,316 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:59:04,316 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:59:04,316 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:59:04,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:59:04,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:04,317 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:59:04,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:04,354 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:04,549 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:59:04,549 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:59:04,549 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 [2018-06-22 14:59:04,557 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:59:04,586 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:04,594 INFO ]: Computing forward predicates... [2018-06-22 14:59:05,076 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:59:05,097 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:59:05,097 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:59:05,097 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:59:05,097 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:59:05,098 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:59:05,098 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:59:05,317 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:59:05,317 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:59:05,317 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:59:05,317 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:59:05,318 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:59:05,318 INFO ]: With dead ends: 15 [2018-06-22 14:59:05,318 INFO ]: Without dead ends: 15 [2018-06-22 14:59:05,319 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:59:05,319 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:59:05,322 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:59:05,322 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:59:05,323 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:59:05,323 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:59:05,323 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:59:05,323 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:59:05,323 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:59:05,323 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:59:05,324 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:59:05,324 INFO ]: Found error trace [2018-06-22 14:59:05,324 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:59:05,324 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:59:05,324 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:59:05,324 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:59:05,324 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:59:05,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:05,325 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:59:05,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:05,371 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:05,679 WARN ]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:59:05,751 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:59:05,751 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:59:05,751 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 14:59:05,758 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:59:05,781 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:59:05,781 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:05,784 INFO ]: Computing forward predicates... [2018-06-22 14:59:06,175 WARN ]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 14:59:06,299 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:59:06,318 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:59:06,318 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:59:06,318 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:59:06,318 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:59:06,319 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:59:06,319 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:59:06,774 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:59:06,774 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:59:06,775 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:59:06,775 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:59:06,775 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:59:06,776 INFO ]: With dead ends: 17 [2018-06-22 14:59:06,776 INFO ]: Without dead ends: 17 [2018-06-22 14:59:06,776 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:59:06,776 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:59:06,779 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:59:06,779 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:59:06,779 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:59:06,780 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:59:06,780 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:59:06,780 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:59:06,780 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:59:06,780 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:59:06,781 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:59:06,781 INFO ]: Found error trace [2018-06-22 14:59:06,781 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:59:06,781 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:59:06,781 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:59:06,781 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:59:06,781 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:59:06,782 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:06,782 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:59:06,782 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:59:06,814 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:07,152 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:59:07,152 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:59:07,152 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 14:59:07,160 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:59:07,186 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:59:07,187 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:59:07,190 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:00:18,475 WARN ]: Removed 2 from assertion stack [2018-06-22 15:00:18,475 INFO ]: Timeout while computing interpolants [2018-06-22 15:00:18,677 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:00:18,677 WARN ]: Verification canceled [2018-06-22 15:00:18,681 WARN ]: Timeout [2018-06-22 15:00:18,681 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:00:18 BoogieIcfgContainer [2018-06-22 15:00:18,681 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:00:18,682 INFO ]: Toolchain (without parser) took 75175.42 ms. Allocated memory was 306.7 MB in the beginning and 1.0 GB in the end (delta: 714.6 MB). Free memory was 261.1 MB in the beginning and 895.2 MB in the end (delta: -634.1 MB). Peak memory consumption was 963.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:00:18,683 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:00:18,683 INFO ]: ChcToBoogie took 45.34 ms. Allocated memory is still 306.7 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:00:18,684 INFO ]: Boogie Preprocessor took 58.45 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:00:18,684 INFO ]: RCFGBuilder took 286.05 ms. Allocated memory is still 306.7 MB. Free memory was 257.1 MB in the beginning and 249.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:00:18,685 INFO ]: TraceAbstraction took 74776.16 ms. Allocated memory was 306.7 MB in the beginning and 1.0 GB in the end (delta: 714.6 MB). Free memory was 249.1 MB in the beginning and 895.2 MB in the end (delta: -646.0 MB). Peak memory consumption was 951.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:00:18,688 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 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 45.34 ms. Allocated memory is still 306.7 MB. Free memory was 261.1 MB in the beginning and 259.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.45 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 286.05 ms. Allocated memory is still 306.7 MB. Free memory was 257.1 MB in the beginning and 249.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 74776.16 ms. Allocated memory was 306.7 MB in the beginning and 1.0 GB in the end (delta: 714.6 MB). Free memory was 249.1 MB in the beginning and 895.2 MB in the end (delta: -646.0 MB). Peak memory consumption was 951.1 MB. 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 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 4262. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 74.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 22 SDslu, 81 SDs, 0 SdLazy, 58 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 3384 SizeOfPredicates, 33 NumberOfNonLiveVariables, 162 ConjunctsInSsa, 30 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/dillig28.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-00-18-707.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig28.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-00-18-707.csv Completed graceful shutdown