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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:41:16,507 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:41:16,539 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:41:16,556 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:41:16,556 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:41:16,557 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:41:16,559 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:41:16,565 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:41:16,567 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:41:16,567 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:41:16,570 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:41:16,570 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:41:16,571 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:41:16,572 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:41:16,575 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:41:16,576 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:41:16,589 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:41:16,593 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:41:16,594 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:41:16,595 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:41:16,596 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:41:16,602 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:41:16,602 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:41:16,603 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:41:16,603 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:41:16,608 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:41:16,609 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:41:16,609 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:41:16,610 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:41:16,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:41:16,611 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:41:16,612 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:41:16,612 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:41:16,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:41:16,613 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:41:16,614 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:41:16,635 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:41:16,637 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:41:16,638 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:41:16,638 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:41:16,639 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:41:16,642 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:41:16,642 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:41:16,642 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:41:16,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:41:16,643 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:41:16,643 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:41:16,643 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:41:16,643 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:41:16,643 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:41:16,644 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:41:16,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:41:16,644 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:41:16,646 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:41:16,646 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:41:16,694 INFO ]: Repository-Root is: /tmp [2018-06-22 05:41:16,760 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:41:16,764 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:41:16,766 INFO ]: Initializing SmtParser... [2018-06-22 05:41:16,766 INFO ]: SmtParser initialized [2018-06-22 05:41:16,767 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-22 05:41:16,797 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 05:41:17,731 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 unknown [2018-06-22 05:41:18,423 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-22 05:41:18,428 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:41:18,434 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:41:18,436 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:41:18,436 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:41:18,436 INFO ]: ChcToBoogie initialized [2018-06-22 05:41:18,467 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,756 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18 Unit [2018-06-22 05:41:18,756 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:41:18,756 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:41:18,756 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:41:18,756 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:41:18,890 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,890 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,901 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,901 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,915 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,923 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,925 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,933 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:41:18,934 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:41:18,934 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:41:18,934 INFO ]: RCFGBuilder initialized [2018-06-22 05:41:18,935 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:41:19,009 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:41:19,009 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:41:19,009 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:41:19,009 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:41:19,009 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:41:19,009 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:41:19,364 INFO ]: Using library mode [2018-06-22 05:41:19,365 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:41:19 BoogieIcfgContainer [2018-06-22 05:41:19,365 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:41:19,367 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:41:19,367 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:41:19,370 INFO ]: TraceAbstraction initialized [2018-06-22 05:41:19,370 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:41:18" (1/3) ... [2018-06-22 05:41:19,374 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cefbd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:41:19, skipping insertion in model container [2018-06-22 05:41:19,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (2/3) ... [2018-06-22 05:41:19,375 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cefbd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:41:19, skipping insertion in model container [2018-06-22 05:41:19,375 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:41:19" (3/3) ... [2018-06-22 05:41:19,377 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:41:19,388 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:41:19,395 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:41:19,576 INFO ]: Using default assertion order modulation [2018-06-22 05:41:19,577 INFO ]: Interprodecural is true [2018-06-22 05:41:19,577 INFO ]: Hoare is false [2018-06-22 05:41:19,577 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:41:19,577 INFO ]: Backedges is TWOTRACK [2018-06-22 05:41:19,577 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:41:19,577 INFO ]: Difference is false [2018-06-22 05:41:19,577 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:41:19,577 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:41:19,659 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:41:19,683 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:41:19,683 INFO ]: Found error trace [2018-06-22 05:41:19,683 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:19,684 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:19,687 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:41:19,689 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:19,689 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:19,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:19,834 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:19,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:19,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:20,080 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:20,082 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:41:20,082 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:41:20,102 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:41:20,178 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:41:20,178 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:41:20,215 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:41:20,413 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:20,413 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:41:20,414 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:41:20,415 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:41:20,415 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:20,443 INFO ]: With dead ends: 9 [2018-06-22 05:41:20,443 INFO ]: Without dead ends: 9 [2018-06-22 05:41:20,445 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:41:20,605 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:41:20,667 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:41:20,710 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:41:20,711 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:41:20,712 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:41:20,713 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:20,713 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:41:20,713 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:41:20,713 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:41:20,713 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:41:20,713 INFO ]: Found error trace [2018-06-22 05:41:20,713 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:20,713 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:20,714 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:41:20,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:20,714 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:20,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:20,715 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:20,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:20,771 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:20,938 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:20,938 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:20,938 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 05:41:20,950 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:20,996 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:21,005 INFO ]: Computing forward predicates... [2018-06-22 05:41:22,313 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:22,345 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:22,345 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:41:22,345 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:41:22,345 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:41:22,345 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:41:22,346 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:41:22,429 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:22,429 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:41:22,429 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:41:22,430 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:41:22,430 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:22,430 INFO ]: With dead ends: 10 [2018-06-22 05:41:22,430 INFO ]: Without dead ends: 10 [2018-06-22 05:41:22,431 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:41:22,431 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:41:22,432 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:41:22,432 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:41:22,432 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:41:22,432 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:41:22,432 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:22,432 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:41:22,432 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:41:22,432 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:41:22,433 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:41:22,433 INFO ]: Found error trace [2018-06-22 05:41:22,433 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:22,433 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:22,433 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:41:22,433 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:22,433 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:22,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:22,434 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:22,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:22,473 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:22,612 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:22,612 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:22,612 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 05:41:22,627 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:41:22,687 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:41:22,687 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:22,690 INFO ]: Computing forward predicates... [2018-06-22 05:41:25,339 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:25,359 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:25,359 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:41:25,360 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:41:25,360 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:41:25,360 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:41:25,360 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:41:25,438 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:25,438 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:41:25,438 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:41:25,438 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:41:25,438 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:25,438 INFO ]: With dead ends: 11 [2018-06-22 05:41:25,438 INFO ]: Without dead ends: 11 [2018-06-22 05:41:25,439 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:41:25,439 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:41:25,440 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:41:25,440 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:41:25,440 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:41:25,440 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:41:25,440 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:25,441 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:41:25,441 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:41:25,441 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:41:25,441 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:41:25,441 INFO ]: Found error trace [2018-06-22 05:41:25,441 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:25,441 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:25,441 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:41:25,441 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:25,441 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:25,442 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:25,442 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:25,442 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:25,489 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:25,662 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:25,695 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:25,695 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 05:41:25,711 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:41:25,741 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:41:25,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:25,743 INFO ]: Computing forward predicates... [2018-06-22 05:41:28,417 WARN ]: Spent 731.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 7 [2018-06-22 05:41:32,037 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:32,062 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:32,062 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:41:32,062 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:41:32,062 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:41:32,063 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:41:32,063 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:41:32,293 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-22 05:41:32,364 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:32,365 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:41:32,365 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:41:32,365 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:41:32,365 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:32,365 INFO ]: With dead ends: 12 [2018-06-22 05:41:32,365 INFO ]: Without dead ends: 12 [2018-06-22 05:41:32,366 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:41:32,366 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:41:32,367 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:41:32,367 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:41:32,367 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:41:32,368 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:41:32,368 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:32,368 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:41:32,368 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:41:32,368 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:41:32,368 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:41:32,368 INFO ]: Found error trace [2018-06-22 05:41:32,368 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:32,368 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:32,368 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:41:32,368 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:32,368 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:32,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:32,369 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:32,369 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:32,411 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:32,601 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:32,601 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:32,601 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:41:32,608 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:41:32,657 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:41:32,657 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:32,661 INFO ]: Computing forward predicates... [2018-06-22 05:41:36,031 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,047 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,065 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,080 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,097 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,119 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,133 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,152 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,168 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,182 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,183 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,200 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,225 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,244 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,265 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,293 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,311 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,325 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,341 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,361 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,376 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,392 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,407 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,422 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,439 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,462 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,476 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,495 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:36,511 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:47,926 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 7 [2018-06-22 05:41:48,681 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:48,700 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:48,700 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:41:48,700 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:41:48,700 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:41:48,701 INFO ]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:41:48,701 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:41:48,866 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:48,866 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:41:48,866 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:41:48,866 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:41:48,866 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:48,867 INFO ]: With dead ends: 13 [2018-06-22 05:41:48,867 INFO ]: Without dead ends: 13 [2018-06-22 05:41:48,867 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:41:48,867 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:41:48,868 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:41:48,868 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:41:48,868 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:41:48,868 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:41:48,868 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:48,868 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:41:48,868 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:41:48,868 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:41:48,869 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:41:48,869 INFO ]: Found error trace [2018-06-22 05:41:48,869 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:48,869 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:48,869 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:41:48,869 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:48,869 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:48,870 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:48,870 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:48,870 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:48,941 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:49,174 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:49,174 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:49,174 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:41:49,192 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:41:49,289 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:41:49,289 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:49,293 INFO ]: Computing forward predicates... [2018-06-22 05:41:52,674 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:52,695 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:52,695 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 05:41:52,695 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:41:52,695 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:41:52,695 INFO ]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:41:52,696 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-06-22 05:41:52,883 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:52,884 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:41:52,884 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:41:52,884 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-22 05:41:52,884 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:52,884 INFO ]: With dead ends: 14 [2018-06-22 05:41:52,884 INFO ]: Without dead ends: 14 [2018-06-22 05:41:52,885 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:41:52,885 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:41:52,886 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:41:52,886 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:41:52,887 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:41:52,887 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:41:52,887 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:52,887 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:41:52,887 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:41:52,887 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:41:52,887 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:41:52,887 INFO ]: Found error trace [2018-06-22 05:41:52,887 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:52,888 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:52,888 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:41:52,888 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:52,888 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:52,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:52,888 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:52,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:52,980 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:53,836 WARN ]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 05:41:54,335 WARN ]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:41:54,564 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:54,564 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:54,564 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:41:54,572 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:41:54,669 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:41:54,669 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:54,673 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:42:23,045 INFO ]: Timeout while computing interpolants [2018-06-22 05:42:23,245 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:42:23,246 WARN ]: Verification canceled [2018-06-22 05:42:23,249 WARN ]: Timeout [2018-06-22 05:42:23,250 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:42:23 BoogieIcfgContainer [2018-06-22 05:42:23,250 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:42:23,250 INFO ]: Toolchain (without parser) took 64822.51 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.2 MB in the beginning and 755.7 MB in the end (delta: -494.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:42:23,251 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:42:23,252 INFO ]: ChcToBoogie took 320.35 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:23,252 INFO ]: Boogie Preprocessor took 176.70 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:23,253 INFO ]: RCFGBuilder took 430.79 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:23,253 INFO ]: TraceAbstraction took 63882.71 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 755.7 MB in the end (delta: -508.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:42:23,257 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 320.35 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 176.70 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 430.79 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63882.71 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 755.7 MB in the end (delta: -508.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 14 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 6112 quantified variables from 12 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.7s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 14 SDslu, 99 SDs, 0 SdLazy, 43 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=6, 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 30.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 3429 SizeOfPredicates, 25 NumberOfNonLiveVariables, 775 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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/nest-if3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-42-23-267.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if3.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-42-23-267.csv Completed graceful shutdown