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/llreve-bench/smt2/loop__loop3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:59:31,502 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:59:31,504 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:59:31,516 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:59:31,516 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:59:31,517 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:59:31,518 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:59:31,521 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:59:31,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:59:31,523 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:59:31,525 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:59:31,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:59:31,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:59:31,527 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:59:31,527 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:59:31,530 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:59:31,531 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:59:31,540 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:59:31,542 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:59:31,542 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:59:31,543 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:59:31,549 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:59:31,549 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:59:31,550 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:59:31,550 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:59:31,551 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:59:31,552 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:59:31,555 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:59:31,556 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:59:31,556 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:59:31,557 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:59:31,557 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:59:31,557 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:59:31,562 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:59:31,563 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:59:31,563 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 11:59:31,584 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:59:31,584 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:59:31,584 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:59:31,585 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:59:31,586 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:59:31,586 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:59:31,586 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:59:31,587 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:59:31,587 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:59:31,587 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:59:31,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:59:31,587 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:59:31,587 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:59:31,588 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:59:31,593 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:59:31,593 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:59:31,638 INFO ]: Repository-Root is: /tmp [2018-06-22 11:59:31,653 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:59:31,658 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:59:31,659 INFO ]: Initializing SmtParser... [2018-06-22 11:59:31,659 INFO ]: SmtParser initialized [2018-06-22 11:59:31,660 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__loop3.smt2 [2018-06-22 11:59:31,661 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 11:59:31,748 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__loop3.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@532e5b40 [2018-06-22 11:59:31,894 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__loop3.smt2 [2018-06-22 11:59:31,898 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:59:31,904 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:59:31,905 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:59:31,905 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:59:31,905 INFO ]: ChcToBoogie initialized [2018-06-22 11:59:31,908 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,951 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31 Unit [2018-06-22 11:59:31,951 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:59:31,952 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:59:31,952 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:59:31,952 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:59:31,975 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,975 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,987 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,987 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,989 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,991 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,993 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (1/1) ... [2018-06-22 11:59:31,994 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:59:31,995 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:59:31,995 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:59:31,995 INFO ]: RCFGBuilder initialized [2018-06-22 11:59:31,996 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (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 11:59:32,009 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:59:32,009 INFO ]: Found specification of procedure False [2018-06-22 11:59:32,009 INFO ]: Found implementation of procedure False [2018-06-22 11:59:32,009 INFO ]: Specification and implementation of procedure INV_MAIN_42 given in one single declaration [2018-06-22 11:59:32,009 INFO ]: Found specification of procedure INV_MAIN_42 [2018-06-22 11:59:32,009 INFO ]: Found implementation of procedure INV_MAIN_42 [2018-06-22 11:59:32,009 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:59:32,009 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:59:32,009 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 11:59:32,237 INFO ]: Using library mode [2018-06-22 11:59:32,237 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:32 BoogieIcfgContainer [2018-06-22 11:59:32,237 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:59:32,239 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:59:32,239 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:59:32,242 INFO ]: TraceAbstraction initialized [2018-06-22 11:59:32,242 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:31" (1/3) ... [2018-06-22 11:59:32,243 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790c93fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:59:32, skipping insertion in model container [2018-06-22 11:59:32,243 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:31" (2/3) ... [2018-06-22 11:59:32,243 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790c93fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:59:32, skipping insertion in model container [2018-06-22 11:59:32,243 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:32" (3/3) ... [2018-06-22 11:59:32,245 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:59:32,254 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:59:32,265 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:59:32,301 INFO ]: Using default assertion order modulation [2018-06-22 11:59:32,302 INFO ]: Interprodecural is true [2018-06-22 11:59:32,302 INFO ]: Hoare is false [2018-06-22 11:59:32,302 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:59:32,302 INFO ]: Backedges is TWOTRACK [2018-06-22 11:59:32,302 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:59:32,302 INFO ]: Difference is false [2018-06-22 11:59:32,302 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:59:32,302 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:59:32,315 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:59:32,328 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:59:32,328 INFO ]: Found error trace [2018-06-22 11:59:32,328 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:32,328 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:32,332 INFO ]: Analyzing trace with hash -911285918, now seen corresponding path program 1 times [2018-06-22 11:59:32,333 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:32,334 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:32,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:32,365 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:32,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:32,407 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:32,519 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:59:32,521 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:32,521 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:32,522 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:32,532 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:32,533 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:32,535 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:59:32,672 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:32,672 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:59:32,673 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:59:32,674 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:59:32,674 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:32,682 INFO ]: With dead ends: 15 [2018-06-22 11:59:32,682 INFO ]: Without dead ends: 15 [2018-06-22 11:59:32,684 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 11:59:32,698 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:59:32,718 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:59:32,720 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:59:32,720 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:59:32,722 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:59:32,723 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:32,723 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:59:32,723 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:32,724 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:59:32,725 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:32,725 INFO ]: Found error trace [2018-06-22 11:59:32,725 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:32,726 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:32,726 INFO ]: Analyzing trace with hash 2036612432, now seen corresponding path program 1 times [2018-06-22 11:59:32,726 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:32,726 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:32,727 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:32,727 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:32,727 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:32,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:33,125 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:33,125 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:33,125 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) [2018-06-22 11:59:33,142 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:33,188 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:33,200 INFO ]: Computing forward predicates... [2018-06-22 11:59:33,637 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-22 11:59:33,660 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:33,698 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:33,698 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 11:59:33,698 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:59:33,698 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:59:33,699 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:59:33,699 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 9 states. [2018-06-22 11:59:34,176 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:34,176 INFO ]: Finished difference Result 29 states and 52 transitions. [2018-06-22 11:59:34,176 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:59:34,176 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 11:59:34,177 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:34,178 INFO ]: With dead ends: 29 [2018-06-22 11:59:34,178 INFO ]: Without dead ends: 29 [2018-06-22 11:59:34,178 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:59:34,179 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 11:59:34,190 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 19. [2018-06-22 11:59:34,190 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 11:59:34,191 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2018-06-22 11:59:34,192 INFO ]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 13 [2018-06-22 11:59:34,192 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:34,192 INFO ]: Abstraction has 19 states and 31 transitions. [2018-06-22 11:59:34,192 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:59:34,192 INFO ]: Start isEmpty. Operand 19 states and 31 transitions. [2018-06-22 11:59:34,193 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:34,193 INFO ]: Found error trace [2018-06-22 11:59:34,193 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:34,193 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:34,193 INFO ]: Analyzing trace with hash 1791361579, now seen corresponding path program 1 times [2018-06-22 11:59:34,193 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:34,193 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:34,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:34,194 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:34,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:34,217 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:34,322 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:34,322 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:34,322 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 11:59:34,332 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:34,343 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:34,344 INFO ]: Computing forward predicates... [2018-06-22 11:59:34,635 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:34,665 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:34,666 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 11:59:34,666 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:59:34,666 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:59:34,666 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:59:34,666 INFO ]: Start difference. First operand 19 states and 31 transitions. Second operand 8 states. [2018-06-22 11:59:34,931 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:34,931 INFO ]: Finished difference Result 25 states and 44 transitions. [2018-06-22 11:59:34,932 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:59:34,932 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 11:59:34,932 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:34,933 INFO ]: With dead ends: 25 [2018-06-22 11:59:34,933 INFO ]: Without dead ends: 25 [2018-06-22 11:59:34,935 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:59:34,935 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 11:59:34,941 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-06-22 11:59:34,941 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 11:59:34,942 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2018-06-22 11:59:34,942 INFO ]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 13 [2018-06-22 11:59:34,942 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:34,942 INFO ]: Abstraction has 21 states and 35 transitions. [2018-06-22 11:59:34,942 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:59:34,942 INFO ]: Start isEmpty. Operand 21 states and 35 transitions. [2018-06-22 11:59:34,944 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:34,944 INFO ]: Found error trace [2018-06-22 11:59:34,944 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:34,944 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:34,945 INFO ]: Analyzing trace with hash 967471092, now seen corresponding path program 1 times [2018-06-22 11:59:34,945 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:34,945 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:34,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:34,945 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:34,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:34,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:34,995 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:34,995 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:34,996 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:34,996 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:34,996 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:34,996 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:34,996 INFO ]: Start difference. First operand 21 states and 35 transitions. Second operand 4 states. [2018-06-22 11:59:35,044 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:35,044 INFO ]: Finished difference Result 36 states and 58 transitions. [2018-06-22 11:59:35,044 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:59:35,044 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:59:35,044 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:35,045 INFO ]: With dead ends: 36 [2018-06-22 11:59:35,046 INFO ]: Without dead ends: 32 [2018-06-22 11:59:35,046 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:59:35,046 INFO ]: Start minimizeSevpa. Operand 32 states. [2018-06-22 11:59:35,052 INFO ]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-06-22 11:59:35,052 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 11:59:35,053 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 47 transitions. [2018-06-22 11:59:35,053 INFO ]: Start accepts. Automaton has 28 states and 47 transitions. Word has length 17 [2018-06-22 11:59:35,054 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:35,054 INFO ]: Abstraction has 28 states and 47 transitions. [2018-06-22 11:59:35,054 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:35,054 INFO ]: Start isEmpty. Operand 28 states and 47 transitions. [2018-06-22 11:59:35,056 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:35,056 INFO ]: Found error trace [2018-06-22 11:59:35,056 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:35,056 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:35,056 INFO ]: Analyzing trace with hash -106792002, now seen corresponding path program 2 times [2018-06-22 11:59:35,056 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:35,056 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:35,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:35,057 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:35,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:35,069 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:35,191 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:35,191 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:35,191 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 11:59:35,197 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:35,235 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:35,235 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:35,239 INFO ]: Computing forward predicates... [2018-06-22 11:59:35,536 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:35,556 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:35,556 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 11:59:35,556 INFO ]: Interpolant automaton has 13 states [2018-06-22 11:59:35,557 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 11:59:35,557 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:59:35,557 INFO ]: Start difference. First operand 28 states and 47 transitions. Second operand 13 states. [2018-06-22 11:59:36,606 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:36,606 INFO ]: Finished difference Result 49 states and 97 transitions. [2018-06-22 11:59:36,606 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 11:59:36,606 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 11:59:36,606 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:36,608 INFO ]: With dead ends: 49 [2018-06-22 11:59:36,608 INFO ]: Without dead ends: 39 [2018-06-22 11:59:36,608 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:59:36,608 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 11:59:36,618 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-06-22 11:59:36,618 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:59:36,619 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-06-22 11:59:36,619 INFO ]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 17 [2018-06-22 11:59:36,619 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:36,619 INFO ]: Abstraction has 30 states and 49 transitions. [2018-06-22 11:59:36,619 INFO ]: Interpolant automaton has 13 states. [2018-06-22 11:59:36,620 INFO ]: Start isEmpty. Operand 30 states and 49 transitions. [2018-06-22 11:59:36,620 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:36,620 INFO ]: Found error trace [2018-06-22 11:59:36,621 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:36,621 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:36,621 INFO ]: Analyzing trace with hash 1667966004, now seen corresponding path program 2 times [2018-06-22 11:59:36,621 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:36,621 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:36,622 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:36,622 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:36,622 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:36,631 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:36,701 INFO ]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:36,701 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:36,701 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) [2018-06-22 11:59:36,711 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:36,729 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:36,729 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:36,731 INFO ]: Computing forward predicates... [2018-06-22 11:59:36,813 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:36,841 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:36,841 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2018-06-22 11:59:36,841 INFO ]: Interpolant automaton has 11 states [2018-06-22 11:59:36,841 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 11:59:36,841 INFO ]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:59:36,842 INFO ]: Start difference. First operand 30 states and 49 transitions. Second operand 11 states. [2018-06-22 11:59:37,012 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:37,012 INFO ]: Finished difference Result 36 states and 52 transitions. [2018-06-22 11:59:37,012 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:59:37,012 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 11:59:37,012 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:37,013 INFO ]: With dead ends: 36 [2018-06-22 11:59:37,013 INFO ]: Without dead ends: 32 [2018-06-22 11:59:37,014 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:59:37,014 INFO ]: Start minimizeSevpa. Operand 32 states. [2018-06-22 11:59:37,019 INFO ]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-06-22 11:59:37,019 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 11:59:37,019 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 43 transitions. [2018-06-22 11:59:37,020 INFO ]: Start accepts. Automaton has 28 states and 43 transitions. Word has length 17 [2018-06-22 11:59:37,020 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:37,020 INFO ]: Abstraction has 28 states and 43 transitions. [2018-06-22 11:59:37,020 INFO ]: Interpolant automaton has 11 states. [2018-06-22 11:59:37,020 INFO ]: Start isEmpty. Operand 28 states and 43 transitions. [2018-06-22 11:59:37,021 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:37,021 INFO ]: Found error trace [2018-06-22 11:59:37,021 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:37,021 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:37,021 INFO ]: Analyzing trace with hash -1389374833, now seen corresponding path program 1 times [2018-06-22 11:59:37,021 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:37,021 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:37,022 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,022 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:37,022 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:37,057 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:37,057 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:37,057 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:37,057 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:37,057 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:37,057 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:37,057 INFO ]: Start difference. First operand 28 states and 43 transitions. Second operand 4 states. [2018-06-22 11:59:37,120 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:37,120 INFO ]: Finished difference Result 32 states and 46 transitions. [2018-06-22 11:59:37,120 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:59:37,120 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:59:37,120 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:37,121 INFO ]: With dead ends: 32 [2018-06-22 11:59:37,121 INFO ]: Without dead ends: 24 [2018-06-22 11:59:37,121 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:59:37,121 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 11:59:37,126 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-06-22 11:59:37,126 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 11:59:37,127 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2018-06-22 11:59:37,127 INFO ]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 17 [2018-06-22 11:59:37,127 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:37,127 INFO ]: Abstraction has 20 states and 27 transitions. [2018-06-22 11:59:37,127 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:37,127 INFO ]: Start isEmpty. Operand 20 states and 27 transitions. [2018-06-22 11:59:37,127 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:37,127 INFO ]: Found error trace [2018-06-22 11:59:37,127 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:37,127 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:37,128 INFO ]: Analyzing trace with hash 1130834457, now seen corresponding path program 1 times [2018-06-22 11:59:37,128 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:37,128 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:37,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,128 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:37,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,151 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:37,218 INFO ]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:59:37,218 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:37,218 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 11:59:37,225 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:37,239 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:37,241 INFO ]: Computing forward predicates... [2018-06-22 11:59:37,296 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:37,315 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:37,315 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-06-22 11:59:37,315 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:59:37,315 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:59:37,315 INFO ]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:59:37,315 INFO ]: Start difference. First operand 20 states and 27 transitions. Second operand 10 states. [2018-06-22 11:59:37,486 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:37,486 INFO ]: Finished difference Result 44 states and 63 transitions. [2018-06-22 11:59:37,487 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:59:37,487 INFO ]: Start accepts. Automaton has 10 states. Word has length 17 [2018-06-22 11:59:37,487 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:37,488 INFO ]: With dead ends: 44 [2018-06-22 11:59:37,488 INFO ]: Without dead ends: 44 [2018-06-22 11:59:37,488 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:59:37,488 INFO ]: Start minimizeSevpa. Operand 44 states. [2018-06-22 11:59:37,494 INFO ]: Finished minimizeSevpa. Reduced states from 44 to 24. [2018-06-22 11:59:37,494 INFO ]: Start removeUnreachable. Operand 24 states. [2018-06-22 11:59:37,495 INFO ]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2018-06-22 11:59:37,495 INFO ]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 17 [2018-06-22 11:59:37,495 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:37,495 INFO ]: Abstraction has 24 states and 33 transitions. [2018-06-22 11:59:37,495 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:59:37,495 INFO ]: Start isEmpty. Operand 24 states and 33 transitions. [2018-06-22 11:59:37,496 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:59:37,496 INFO ]: Found error trace [2018-06-22 11:59:37,496 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:37,496 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:37,496 INFO ]: Analyzing trace with hash 304175138, now seen corresponding path program 2 times [2018-06-22 11:59:37,496 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:37,496 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:37,497 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,497 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:37,497 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:37,506 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:37,589 INFO ]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:59:37,589 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:37,589 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 11:59:37,595 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:37,612 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:37,612 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:37,615 INFO ]: Computing forward predicates... [2018-06-22 11:59:37,796 INFO ]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:59:37,814 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:37,814 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 11:59:37,814 INFO ]: Interpolant automaton has 16 states [2018-06-22 11:59:37,814 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 11:59:37,815 INFO ]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:59:37,815 INFO ]: Start difference. First operand 24 states and 33 transitions. Second operand 16 states. [2018-06-22 11:59:38,287 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:38,287 INFO ]: Finished difference Result 29 states and 34 transitions. [2018-06-22 11:59:38,288 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 11:59:38,288 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 11:59:38,288 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:38,288 INFO ]: With dead ends: 29 [2018-06-22 11:59:38,288 INFO ]: Without dead ends: 0 [2018-06-22 11:59:38,288 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:59:38,289 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:59:38,289 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:59:38,289 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:59:38,289 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:59:38,289 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 11:59:38,289 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:38,289 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:59:38,289 INFO ]: Interpolant automaton has 16 states. [2018-06-22 11:59:38,289 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:59:38,289 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:59:38,294 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:59:38 BoogieIcfgContainer [2018-06-22 11:59:38,294 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:59:38,295 INFO ]: Toolchain (without parser) took 6395.74 ms. Allocated memory was 309.3 MB in the beginning and 361.2 MB in the end (delta: 51.9 MB). Free memory was 265.7 MB in the beginning and 208.2 MB in the end (delta: 57.5 MB). Peak memory consumption was 109.4 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:38,295 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:38,296 INFO ]: ChcToBoogie took 46.60 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:38,296 INFO ]: Boogie Preprocessor took 42.69 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 262.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:38,297 INFO ]: RCFGBuilder took 242.76 ms. Allocated memory is still 309.3 MB. Free memory was 262.6 MB in the beginning and 254.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:38,297 INFO ]: TraceAbstraction took 6055.19 ms. Allocated memory was 309.3 MB in the beginning and 361.2 MB in the end (delta: 51.9 MB). Free memory was 254.6 MB in the beginning and 208.2 MB in the end (delta: 46.3 MB). Peak memory consumption was 98.2 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:38,300 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 46.60 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.69 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 262.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 242.76 ms. Allocated memory is still 309.3 MB. Free memory was 262.6 MB in the beginning and 254.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6055.19 ms. Allocated memory was 309.3 MB in the beginning and 361.2 MB in the end (delta: 51.9 MB). Free memory was 254.6 MB in the beginning and 208.2 MB in the end (delta: 46.3 MB). Peak memory consumption was 98.2 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, 15 locations, 1 error locations. SAFE Result, 5.9s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 68 SDslu, 379 SDs, 0 SdLazy, 879 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 9 MinimizatonAttempts, 55 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 239 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 224 ConstructedInterpolants, 0 QuantifiedInterpolants, 16360 SizeOfPredicates, 40 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 73/126 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/loop__loop3.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-59-38-310.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__loop3.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-59-38-310.csv Received shutdown request...