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/dillig28.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:17:49,454 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:17:49,456 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:17:49,471 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:17:49,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:17:49,473 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:17:49,474 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:17:49,478 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:17:49,479 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:17:49,481 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:17:49,482 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:17:49,482 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:17:49,483 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:17:49,487 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:17:49,488 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:17:49,489 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:17:49,490 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:17:49,500 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:17:49,502 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:17:49,503 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:17:49,504 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:17:49,509 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:17:49,509 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:17:49,510 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:17:49,510 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:17:49,515 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:17:49,515 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:17:49,516 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:17:49,517 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:17:49,517 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:17:49,522 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:17:49,523 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:17:49,523 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:17:49,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:17:49,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:17:49,525 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:17:49,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:17:49,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:17:49,539 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:17:49,539 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:17:49,541 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:17:49,541 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:17:49,541 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:17:49,541 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:17:49,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:17:49,542 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:17:49,542 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:17:49,542 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:17:49,542 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:17:49,542 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:17:49,542 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:17:49,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:17:49,543 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:17:49,544 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:17:49,544 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:17:49,593 INFO ]: Repository-Root is: /tmp [2018-06-18 13:17:49,608 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:17:49,613 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:17:49,615 INFO ]: Initializing SmtParser... [2018-06-18 13:17:49,615 INFO ]: SmtParser initialized [2018-06-18 13:17:49,615 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 [2018-06-18 13:17:49,617 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 13:17:49,707 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 unknown [2018-06-18 13:17:49,944 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig28.c.smt2 [2018-06-18 13:17:49,949 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:17:49,955 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:17:49,955 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:17:49,955 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:17:49,956 INFO ]: ChcToBoogie initialized [2018-06-18 13:17:49,962 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:17:49" (1/1) ... [2018-06-18 13:17:50,039 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50 Unit [2018-06-18 13:17:50,039 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:17:50,040 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:17:50,040 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:17:50,040 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:17:50,062 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,062 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,082 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,083 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,086 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,087 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,088 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (1/1) ... [2018-06-18 13:17:50,100 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:17:50,101 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:17:50,101 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:17:50,101 INFO ]: RCFGBuilder initialized [2018-06-18 13:17:50,102 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (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 13:17:50,124 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:17:50,125 INFO ]: Found specification of procedure False [2018-06-18 13:17:50,125 INFO ]: Found implementation of procedure False Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:17:50,125 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:17:50,125 INFO ]: Found specification of procedure state [2018-06-18 13:17:50,125 INFO ]: Found implementation of procedure state [2018-06-18 13:17:50,125 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:17:50,125 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:17:50,125 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 13:17:50,355 INFO ]: Using library mode [2018-06-18 13:17:50,356 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:17:50 BoogieIcfgContainer [2018-06-18 13:17:50,356 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:17:50,364 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:17:50,364 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:17:50,367 INFO ]: TraceAbstraction initialized [2018-06-18 13:17:50,368 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:17:49" (1/3) ... [2018-06-18 13:17:50,368 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bf029a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:17:50, skipping insertion in model container [2018-06-18 13:17:50,369 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:17:50" (2/3) ... [2018-06-18 13:17:50,369 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bf029a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:17:50, skipping insertion in model container [2018-06-18 13:17:50,369 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:17:50" (3/3) ... [2018-06-18 13:17:50,371 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:17:50,380 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:17:50,397 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:17:50,457 INFO ]: Using default assertion order modulation [2018-06-18 13:17:50,458 INFO ]: Interprodecural is true [2018-06-18 13:17:50,458 INFO ]: Hoare is false [2018-06-18 13:17:50,458 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:17:50,458 INFO ]: Backedges is TWOTRACK [2018-06-18 13:17:50,458 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:17:50,458 INFO ]: Difference is false [2018-06-18 13:17:50,458 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:17:50,458 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:17:50,476 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:17:50,494 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:17:50,495 INFO ]: Found error trace [2018-06-18 13:17:50,496 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:17:50,496 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:17:50,503 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 13:17:50,505 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:17:50,505 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:17:50,549 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:50,549 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:17:50,549 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:50,575 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:50,583 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:17:50,679 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:17:50,681 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:17:50,682 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:17:50,684 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:17:50,697 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:17:50,698 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:17:50,699 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:17:50,760 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:17:50,760 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:17:50,760 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:17:50,761 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:17:50,761 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:17:50,772 INFO ]: With dead ends: 13 [2018-06-18 13:17:50,772 INFO ]: Without dead ends: 13 [2018-06-18 13:17:50,774 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 13:17:50,793 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:17:50,811 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:17:50,812 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:17:50,813 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:17:50,814 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:17:50,814 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:17:50,814 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:17:50,814 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:17:50,814 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:17:50,816 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:17:50,816 INFO ]: Found error trace [2018-06-18 13:17:50,816 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:17:50,816 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:17:50,816 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 13:17:50,816 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:17:50,816 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:17:50,817 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:50,817 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:17:50,817 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:50,851 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:50,851 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:17:51,031 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:17:51,031 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:17:51,031 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 13:17:51,039 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:17:51,071 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:51,079 INFO ]: Computing forward predicates... [2018-06-18 13:17:51,492 WARN ]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 13:17:51,850 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:17:51,884 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:17:51,884 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:17:51,885 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:17:51,885 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:17:51,885 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:17:51,885 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:17:52,287 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:17:52,287 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:17:52,287 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:17:52,288 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:17:52,288 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:17:52,288 INFO ]: With dead ends: 15 [2018-06-18 13:17:52,288 INFO ]: Without dead ends: 15 [2018-06-18 13:17:52,289 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 13:17:52,289 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:17:52,292 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:17:52,292 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:17:52,293 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:17:52,293 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:17:52,293 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:17:52,293 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:17:52,293 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:17:52,293 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:17:52,294 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:17:52,294 INFO ]: Found error trace [2018-06-18 13:17:52,294 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:17:52,294 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:17:52,294 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 13:17:52,294 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:17:52,294 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:17:52,295 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:52,295 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:17:52,295 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:52,363 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:52,364 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:17:52,645 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:17:52,645 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:17:52,645 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 13:17:52,653 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:17:52,676 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:17:52,676 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:52,679 INFO ]: Computing forward predicates... [2018-06-18 13:17:53,058 WARN ]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 13:17:53,259 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:17:53,279 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:17:53,280 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:17:53,280 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:17:53,280 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:17:53,280 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:17:53,280 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:17:53,627 WARN ]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-18 13:17:53,805 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:17:53,805 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:17:53,805 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:17:53,805 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:17:53,805 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:17:53,806 INFO ]: With dead ends: 17 [2018-06-18 13:17:53,806 INFO ]: Without dead ends: 17 [2018-06-18 13:17:53,806 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 [2018-06-18 13:17:53,806 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:17:53,809 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:17:53,809 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:17:53,810 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:17:53,810 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:17:53,810 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:17:53,810 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:17:53,810 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:17:53,810 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:17:53,811 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:17:53,811 INFO ]: Found error trace [2018-06-18 13:17:53,811 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:17:53,811 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:17:53,811 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 13:17:53,811 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:17:53,811 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:17:53,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:53,812 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:17:53,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:17:53,846 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:53,847 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:17:54,273 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:17:54,274 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:17:54,274 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 13:17:54,284 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:17:54,310 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:17:54,310 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:17:54,314 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 13:19:04,008 WARN ]: Removed 2 from assertion stack [2018-06-18 13:19:04,008 INFO ]: Timeout while computing interpolants [2018-06-18 13:19:04,209 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:19:04,209 WARN ]: Verification canceled [2018-06-18 13:19:04,214 WARN ]: Timeout [2018-06-18 13:19:04,214 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:19:04 BoogieIcfgContainer [2018-06-18 13:19:04,214 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:19:04,217 INFO ]: Toolchain (without parser) took 74265.33 ms. Allocated memory was 302.5 MB in the beginning and 1.1 GB in the end (delta: 813.7 MB). Free memory was 256.9 MB in the beginning and 326.3 MB in the end (delta: -69.5 MB). Peak memory consumption was 959.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:19:04,218 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 302.5 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:19:04,218 INFO ]: ChcToBoogie took 83.88 ms. Allocated memory is still 302.5 MB. Free memory was 256.9 MB in the beginning and 253.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:19:04,219 INFO ]: Boogie Preprocessor took 60.59 ms. Allocated memory is still 302.5 MB. Free memory was 253.9 MB in the beginning and 252.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 13:19:04,219 INFO ]: RCFGBuilder took 255.38 ms. Allocated memory is still 302.5 MB. Free memory was 252.9 MB in the beginning and 243.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:19:04,220 INFO ]: TraceAbstraction took 73850.20 ms. Allocated memory was 302.5 MB in the beginning and 1.1 GB in the end (delta: 813.7 MB). Free memory was 243.9 MB in the beginning and 326.3 MB in the end (delta: -82.4 MB). Peak memory consumption was 946.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:19:04,230 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 302.5 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 83.88 ms. Allocated memory is still 302.5 MB. Free memory was 256.9 MB in the beginning and 253.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 60.59 ms. Allocated memory is still 302.5 MB. Free memory was 253.9 MB in the beginning and 252.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 255.38 ms. Allocated memory is still 302.5 MB. Free memory was 252.9 MB in the beginning and 243.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 73850.20 ms. Allocated memory was 302.5 MB in the beginning and 1.1 GB in the end (delta: 813.7 MB). Free memory was 243.9 MB in the beginning and 326.3 MB in the end (delta: -82.4 MB). Peak memory consumption was 946.0 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, 73.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 22 SDslu, 81 SDs, 0 SdLazy, 58 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.0s 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, 1.9s 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_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-19-04-247.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig28.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-19-04-247.csv Completed graceful shutdown