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/lustre/metros_1_e1_846_e2_1394.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:02:22,703 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:02:22,706 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:02:22,718 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:02:22,718 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:02:22,719 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:02:22,720 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:02:22,722 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:02:22,724 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:02:22,724 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:02:22,725 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:02:22,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:02:22,726 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:02:22,777 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:02:22,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:02:22,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:02:22,781 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:02:22,782 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:02:22,784 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:02:22,784 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:02:22,786 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:02:22,790 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:02:22,791 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:02:22,791 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:02:22,795 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:02:22,796 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:02:22,796 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:02:22,797 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:02:22,798 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:02:22,798 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:02:22,799 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:02:22,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:02:22,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:02:22,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:02:22,804 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:02:22,805 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 19:02:22,820 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:02:22,820 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:02:22,821 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:02:22,821 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:02:22,822 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:02:22,822 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:02:22,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:02:22,822 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:02:22,823 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:02:22,823 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:02:22,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:02:22,823 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:02:22,823 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:02:22,824 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:02:22,826 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:02:22,826 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:02:22,871 INFO ]: Repository-Root is: /tmp [2018-06-22 19:02:22,903 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:02:22,908 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:02:22,909 INFO ]: Initializing SmtParser... [2018-06-22 19:02:22,910 INFO ]: SmtParser initialized [2018-06-22 19:02:22,911 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 [2018-06-22 19:02:22,912 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 19:02:23,001 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 unknown [2018-06-22 19:02:23,406 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_1_e1_846_e2_1394.smt2 [2018-06-22 19:02:23,410 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:02:23,417 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:02:23,418 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:02:23,418 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:02:23,418 INFO ]: ChcToBoogie initialized [2018-06-22 19:02:23,421 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,489 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23 Unit [2018-06-22 19:02:23,489 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:02:23,490 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:02:23,490 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:02:23,490 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:02:23,516 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,516 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,536 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,536 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,542 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,551 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,553 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (1/1) ... [2018-06-22 19:02:23,557 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:02:23,557 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:02:23,557 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:02:23,557 INFO ]: RCFGBuilder initialized [2018-06-22 19:02:23,558 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (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 19:02:23,577 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:02:23,577 INFO ]: Found specification of procedure False [2018-06-22 19:02:23,577 INFO ]: Found implementation of procedure False [2018-06-22 19:02:23,577 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:02:23,577 INFO ]: Found specification of procedure state [2018-06-22 19:02:23,577 INFO ]: Found implementation of procedure state [2018-06-22 19:02:23,577 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:02:23,577 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:02:23,577 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 19:02:23,911 INFO ]: Using library mode [2018-06-22 19:02:23,912 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:02:23 BoogieIcfgContainer [2018-06-22 19:02:23,912 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:02:23,913 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:02:23,913 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:02:23,916 INFO ]: TraceAbstraction initialized [2018-06-22 19:02:23,917 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:02:23" (1/3) ... [2018-06-22 19:02:23,917 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c64530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:02:23, skipping insertion in model container [2018-06-22 19:02:23,917 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:02:23" (2/3) ... [2018-06-22 19:02:23,918 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c64530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:02:23, skipping insertion in model container [2018-06-22 19:02:23,918 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:02:23" (3/3) ... [2018-06-22 19:02:23,920 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:02:23,929 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:02:23,939 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:02:23,988 INFO ]: Using default assertion order modulation [2018-06-22 19:02:23,989 INFO ]: Interprodecural is true [2018-06-22 19:02:23,989 INFO ]: Hoare is false [2018-06-22 19:02:23,989 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:02:23,989 INFO ]: Backedges is TWOTRACK [2018-06-22 19:02:23,989 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:02:23,989 INFO ]: Difference is false [2018-06-22 19:02:23,989 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:02:23,989 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:02:24,007 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:02:24,030 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:02:24,030 INFO ]: Found error trace [2018-06-22 19:02:24,031 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:02:24,031 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:02:24,038 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:02:24,051 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:02:24,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:02:24,100 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:24,100 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:02:24,100 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:24,219 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:24,395 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:02:24,397 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:02:24,397 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:02:24,399 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:02:24,413 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:02:24,414 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:02:24,416 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:02:24,567 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:02:24,568 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:02:24,568 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:02:24,570 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:02:24,570 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:02:24,591 INFO ]: With dead ends: 13 [2018-06-22 19:02:24,591 INFO ]: Without dead ends: 13 [2018-06-22 19:02:24,594 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 19:02:24,614 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:02:24,639 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:02:24,640 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:02:24,641 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:02:24,642 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:02:24,642 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:02:24,642 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:02:24,642 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:02:24,642 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:02:24,644 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:02:24,656 INFO ]: Found error trace [2018-06-22 19:02:24,656 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:02:24,656 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:02:24,656 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:02:24,656 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:02:24,656 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:02:24,657 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:24,657 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:02:24,657 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:24,723 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:25,216 WARN ]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 19:02:25,293 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:02:25,293 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:02:25,293 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 19:02:25,308 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:02:25,456 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:25,467 INFO ]: Computing forward predicates... [2018-06-22 19:02:25,854 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 5 DAG size of output: 4 [2018-06-22 19:02:26,059 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:02:26,082 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:02:26,082 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:02:26,082 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:02:26,082 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:02:26,083 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:02:26,083 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:02:26,453 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:02:26,453 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:02:26,454 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:02:26,454 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:02:26,454 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:02:26,455 INFO ]: With dead ends: 15 [2018-06-22 19:02:26,455 INFO ]: Without dead ends: 15 [2018-06-22 19:02:26,455 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 19:02:26,456 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:02:26,460 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:02:26,460 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:02:26,461 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:02:26,461 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:02:26,461 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:02:26,461 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:02:26,461 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:02:26,461 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:02:26,461 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:02:26,462 INFO ]: Found error trace [2018-06-22 19:02:26,462 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:02:26,462 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:02:26,462 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:02:26,462 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:02:26,462 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:02:26,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:26,465 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:02:26,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:26,564 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:27,205 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:02:27,205 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:02:27,205 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 19:02:27,265 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:02:27,414 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:02:27,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:27,419 INFO ]: Computing forward predicates... [2018-06-22 19:02:27,717 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:02:27,739 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:02:27,778 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 19:02:27,779 INFO ]: Interpolant automaton has 12 states [2018-06-22 19:02:27,779 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 19:02:27,783 INFO ]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:02:27,783 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 19:02:28,088 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:02:28,089 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:02:28,089 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:02:28,089 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 19:02:28,089 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:02:28,090 INFO ]: With dead ends: 17 [2018-06-22 19:02:28,090 INFO ]: Without dead ends: 17 [2018-06-22 19:02:28,090 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:02:28,090 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:02:28,094 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:02:28,094 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:02:28,094 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:02:28,094 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:02:28,094 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:02:28,094 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:02:28,094 INFO ]: Interpolant automaton has 12 states. [2018-06-22 19:02:28,094 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:02:28,095 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:02:28,095 INFO ]: Found error trace [2018-06-22 19:02:28,095 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:02:28,095 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:02:28,095 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:02:28,095 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:02:28,095 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:02:28,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:28,096 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:02:28,096 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:02:28,213 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:28,594 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 19:02:28,812 WARN ]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 19:02:29,034 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:02:29,035 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:02:29,035 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 19:02:29,042 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:02:29,208 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:02:29,208 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:02:29,216 INFO ]: Computing forward predicates... [2018-06-22 19:02:29,847 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:02:29,900 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:02:29,961 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:02:30,177 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:02:30,194 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 19:02:30,205 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 19:02:32,361 WARN ]: Spent 704.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2018-06-22 19:02:32,617 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:02:32,649 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:02:32,649 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 19:02:32,649 INFO ]: Interpolant automaton has 16 states [2018-06-22 19:02:32,649 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 19:02:32,649 INFO ]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-06-22 19:02:32,650 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 19:02:33,343 WARN ]: Spent 576.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2018-06-22 19:02:33,730 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2018-06-22 19:02:34,104 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2018-06-22 19:02:34,747 WARN ]: Spent 609.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2018-06-22 19:02:34,758 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:02:34,759 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:02:34,759 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:02:34,759 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 19:02:34,759 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:02:34,759 INFO ]: With dead ends: 13 [2018-06-22 19:02:34,759 INFO ]: Without dead ends: 0 [2018-06-22 19:02:34,759 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:02:34,760 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:02:34,760 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:02:34,760 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:02:34,760 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:02:34,760 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:02:34,760 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:02:34,760 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:02:34,760 INFO ]: Interpolant automaton has 16 states. [2018-06-22 19:02:34,760 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:02:34,760 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:02:34,765 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:02:34 BoogieIcfgContainer [2018-06-22 19:02:34,765 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:02:34,766 INFO ]: Toolchain (without parser) took 11354.81 ms. Allocated memory was 309.9 MB in the beginning and 518.5 MB in the end (delta: 208.7 MB). Free memory was 251.3 MB in the beginning and 304.4 MB in the end (delta: -53.1 MB). Peak memory consumption was 155.6 MB. Max. memory is 3.6 GB. [2018-06-22 19:02:34,766 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:02:34,766 INFO ]: ChcToBoogie took 72.00 ms. Allocated memory is still 309.9 MB. Free memory was 250.3 MB in the beginning and 248.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:02:34,769 INFO ]: Boogie Preprocessor took 66.52 ms. Allocated memory is still 309.9 MB. Free memory was 248.3 MB in the beginning and 246.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:02:34,769 INFO ]: RCFGBuilder took 354.71 ms. Allocated memory is still 309.9 MB. Free memory was 246.3 MB in the beginning and 221.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:02:34,770 INFO ]: TraceAbstraction took 10851.50 ms. Allocated memory was 309.9 MB in the beginning and 518.5 MB in the end (delta: 208.7 MB). Free memory was 221.3 MB in the beginning and 304.4 MB in the end (delta: -83.1 MB). Peak memory consumption was 125.6 MB. Max. memory is 3.6 GB. [2018-06-22 19:02:34,772 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 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 72.00 ms. Allocated memory is still 309.9 MB. Free memory was 250.3 MB in the beginning and 248.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 66.52 ms. Allocated memory is still 309.9 MB. Free memory was 248.3 MB in the beginning and 246.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 354.71 ms. Allocated memory is still 309.9 MB. Free memory was 246.3 MB in the beginning and 221.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 10851.50 ms. Allocated memory was 309.9 MB in the beginning and 518.5 MB in the end (delta: 208.7 MB). Free memory was 221.3 MB in the beginning and 304.4 MB in the end (delta: -83.1 MB). Peak memory consumption was 125.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 10.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 35 SDslu, 113 SDs, 0 SdLazy, 104 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 5.6s 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 11820 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1986 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e1_846_e2_1394.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-02-34-782.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_1_e1_846_e2_1394.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-02-34-782.csv Received shutdown request...