java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:32:55,526 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:32:55,528 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:32:55,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:32:55,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:32:55,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:32:55,543 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:32:55,546 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:32:55,548 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:32:55,548 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:32:55,550 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:32:55,551 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:32:55,551 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:32:55,552 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:32:55,553 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:32:55,555 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:32:55,557 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:32:55,566 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:32:55,568 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:32:55,569 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:32:55,570 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:32:55,573 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:32:55,574 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:32:55,574 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:32:55,575 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:32:55,576 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:32:55,576 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:32:55,577 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:32:55,578 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:32:55,578 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:32:55,579 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:32:55,579 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:32:55,579 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:32:55,580 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:32:55,581 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:32:55,581 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:32:55,595 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:32:55,596 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:32:55,596 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:32:55,596 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:32:55,597 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:32:55,597 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:32:55,598 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:32:55,598 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:32:55,598 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:32:55,598 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:32:55,598 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:32:55,599 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:32:55,599 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:32:55,599 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:32:55,599 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:32:55,599 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:32:55,600 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:32:55,600 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:32:55,600 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:32:55,605 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:32:55,605 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:32:55,651 INFO ]: Repository-Root is: /tmp [2018-06-22 14:32:55,668 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:32:55,676 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:32:55,678 INFO ]: Initializing SmtParser... [2018-06-22 14:32:55,678 INFO ]: SmtParser initialized [2018-06-22 14:32:55,678 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 [2018-06-22 14:32:55,680 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:32:55,766 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 unknown [2018-06-22 14:32:57,589 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.5.smt2 [2018-06-22 14:32:57,594 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:32:57,615 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:32:57,615 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:32:57,615 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:32:57,616 INFO ]: ChcToBoogie initialized [2018-06-22 14:32:57,619 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,721 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57 Unit [2018-06-22 14:32:57,721 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:32:57,722 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:32:57,722 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:32:57,722 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:32:57,753 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,753 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,782 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,782 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,827 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,828 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,838 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (1/1) ... [2018-06-22 14:32:57,849 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:32:57,850 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:32:57,850 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:32:57,850 INFO ]: RCFGBuilder initialized [2018-06-22 14:32:57,851 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (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 14:32:57,863 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:32:57,863 INFO ]: Found specification of procedure False [2018-06-22 14:32:57,863 INFO ]: Found implementation of procedure False [2018-06-22 14:32:57,863 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:32:57,863 INFO ]: Found specification of procedure state [2018-06-22 14:32:57,864 INFO ]: Found implementation of procedure state [2018-06-22 14:32:57,864 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:32:57,864 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:32:57,864 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:32:59,225 INFO ]: Using library mode [2018-06-22 14:32:59,226 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:32:59 BoogieIcfgContainer [2018-06-22 14:32:59,226 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:32:59,227 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:32:59,227 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:32:59,230 INFO ]: TraceAbstraction initialized [2018-06-22 14:32:59,230 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:32:57" (1/3) ... [2018-06-22 14:32:59,231 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29aaf05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:32:59, skipping insertion in model container [2018-06-22 14:32:59,231 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:57" (2/3) ... [2018-06-22 14:32:59,231 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29aaf05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:32:59, skipping insertion in model container [2018-06-22 14:32:59,231 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:32:59" (3/3) ... [2018-06-22 14:32:59,233 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:32:59,242 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:32:59,250 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:32:59,299 INFO ]: Using default assertion order modulation [2018-06-22 14:32:59,300 INFO ]: Interprodecural is true [2018-06-22 14:32:59,300 INFO ]: Hoare is false [2018-06-22 14:32:59,300 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:32:59,300 INFO ]: Backedges is TWOTRACK [2018-06-22 14:32:59,300 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:32:59,300 INFO ]: Difference is false [2018-06-22 14:32:59,300 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:32:59,300 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:32:59,317 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:32:59,327 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:32:59,327 INFO ]: Found error trace [2018-06-22 14:32:59,328 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:59,328 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:59,333 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:32:59,335 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:59,336 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:59,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:59,377 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:59,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:59,489 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:59,616 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:32:59,618 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:32:59,618 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:32:59,619 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:32:59,630 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:32:59,630 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:32:59,632 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:32:59,836 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:32:59,836 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:32:59,837 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:32:59,839 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:32:59,839 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:32:59,853 INFO ]: With dead ends: 13 [2018-06-22 14:32:59,853 INFO ]: Without dead ends: 13 [2018-06-22 14:32:59,855 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:32:59,874 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:32:59,911 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:32:59,912 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:32:59,914 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:32:59,915 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:32:59,915 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:32:59,915 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:32:59,915 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:32:59,915 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:32:59,916 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:32:59,916 INFO ]: Found error trace [2018-06-22 14:32:59,916 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:59,916 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:59,917 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:32:59,917 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:59,917 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:59,918 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:59,918 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:59,918 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:00,236 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:00,853 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:33:00,853 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:00,853 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:33:00,860 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:01,154 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:01,178 INFO ]: Computing forward predicates... [2018-06-22 14:33:03,264 WARN ]: Spent 765.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2018-06-22 14:33:03,505 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:33:03,527 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:03,527 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:33:03,528 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:33:03,528 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:33:03,528 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:33:03,528 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:33:03,959 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:03,959 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:33:03,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:33:03,960 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:33:03,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:03,961 INFO ]: With dead ends: 15 [2018-06-22 14:33:03,961 INFO ]: Without dead ends: 15 [2018-06-22 14:33:03,962 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:33:03,962 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:33:03,965 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:33:03,965 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:33:03,965 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:33:03,965 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:33:03,966 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:03,966 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:33:03,966 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:33:03,966 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:33:03,966 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:33:03,966 INFO ]: Found error trace [2018-06-22 14:33:03,966 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:03,966 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:03,967 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:33:03,967 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:03,967 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:03,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:03,968 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:03,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:04,287 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:04,926 WARN ]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:33:05,119 WARN ]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:33:05,393 WARN ]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:33:05,603 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:33:06,027 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:33:06,028 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:33:06,028 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:06,028 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:33:06,048 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:33:06,374 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:33:06,374 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:06,408 INFO ]: Computing forward predicates... [2018-06-22 14:33:08,027 WARN ]: Spent 273.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-06-22 14:33:10,743 WARN ]: Spent 1.58 s on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-06-22 14:33:12,464 WARN ]: Spent 924.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-06-22 14:33:12,484 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:33:12,521 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:12,521 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 14:33:12,522 INFO ]: Interpolant automaton has 14 states [2018-06-22 14:33:12,522 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 14:33:12,522 INFO ]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:33:12,522 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-06-22 14:33:13,332 WARN ]: Spent 538.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-06-22 14:33:13,556 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 27 [2018-06-22 14:33:13,928 WARN ]: Spent 311.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2018-06-22 14:33:14,058 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:14,058 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:33:14,060 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:33:14,061 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 14:33:14,061 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:14,061 INFO ]: With dead ends: 17 [2018-06-22 14:33:14,061 INFO ]: Without dead ends: 17 [2018-06-22 14:33:14,062 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:33:14,062 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:33:14,064 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:33:14,064 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:33:14,065 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:33:14,065 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:33:14,065 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:14,065 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:33:14,065 INFO ]: Interpolant automaton has 14 states. [2018-06-22 14:33:14,065 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:33:14,066 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:33:14,066 INFO ]: Found error trace [2018-06-22 14:33:14,066 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:14,066 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:14,066 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:33:14,066 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:14,066 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:14,067 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:14,067 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:33:14,067 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:14,343 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:15,293 WARN ]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:33:15,448 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:33:15,448 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:15,448 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:33:15,456 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:33:15,937 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:33:15,937 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:15,978 INFO ]: Computing forward predicates... [2018-06-22 14:33:16,754 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2018-06-22 14:33:17,453 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-06-22 14:33:19,196 WARN ]: Spent 891.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2018-06-22 14:33:19,356 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:33:19,423 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:19,423 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 14:33:19,423 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:33:19,423 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:33:19,423 INFO ]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:33:19,423 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2018-06-22 14:33:19,975 WARN ]: Spent 480.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2018-06-22 14:33:20,529 WARN ]: Spent 288.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-06-22 14:33:20,588 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:20,588 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:33:20,591 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:33:20,591 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-22 14:33:20,592 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:20,592 INFO ]: With dead ends: 19 [2018-06-22 14:33:20,592 INFO ]: Without dead ends: 19 [2018-06-22 14:33:20,593 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:33:20,593 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:33:20,597 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:33:20,597 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:33:20,598 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:33:20,598 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:33:20,598 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:20,598 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:33:20,598 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:33:20,598 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:33:20,600 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:33:20,600 INFO ]: Found error trace [2018-06-22 14:33:20,600 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:20,600 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:20,600 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:33:20,600 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:20,600 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:20,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:20,601 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:33:20,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:20,936 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:21,727 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:33:21,728 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:21,728 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 14:33:21,735 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown