java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/twisted_counters.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 20:47:27,825 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 20:47:27,833 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 20:47:27,848 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 20:47:27,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 20:47:27,849 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 20:47:27,851 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 20:47:27,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 20:47:27,855 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 20:47:27,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 20:47:27,856 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 20:47:27,856 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 20:47:27,857 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 20:47:27,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 20:47:27,859 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 20:47:27,860 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 20:47:27,861 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 20:47:27,863 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 20:47:27,865 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 20:47:27,865 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 20:47:27,867 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 20:47:27,869 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 20:47:27,869 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 20:47:27,869 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 20:47:27,870 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 20:47:27,871 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 20:47:27,872 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 20:47:27,872 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 20:47:27,873 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 20:47:27,874 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 20:47:27,874 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 20:47:27,875 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 20:47:27,875 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 20:47:27,876 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 20:47:27,876 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 20:47:27,877 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 20:47:27,895 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 20:47:27,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 20:47:27,896 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 20:47:27,896 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 20:47:27,897 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 20:47:27,897 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 20:47:27,897 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 20:47:27,897 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 20:47:27,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 20:47:27,898 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 20:47:27,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 20:47:27,898 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 20:47:27,898 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 20:47:27,898 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 20:47:27,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 20:47:27,899 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 20:47:27,899 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 20:47:27,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 20:47:27,900 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 20:47:27,901 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 20:47:27,901 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 20:47:27,935 INFO ]: Repository-Root is: /tmp [2018-06-22 20:47:27,954 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 20:47:27,960 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 20:47:27,961 INFO ]: Initializing SmtParser... [2018-06-22 20:47:27,962 INFO ]: SmtParser initialized [2018-06-22 20:47:27,962 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/twisted_counters.smt2 [2018-06-22 20:47:27,964 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 20:47:28,058 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/twisted_counters.smt2 unknown [2018-06-22 20:47:28,346 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/twisted_counters.smt2 [2018-06-22 20:47:28,350 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 20:47:28,363 INFO ]: Walking toolchain with 4 elements. [2018-06-22 20:47:28,363 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 20:47:28,363 INFO ]: Initializing ChcToBoogie... [2018-06-22 20:47:28,363 INFO ]: ChcToBoogie initialized [2018-06-22 20:47:28,366 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,415 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28 Unit [2018-06-22 20:47:28,415 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 20:47:28,415 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 20:47:28,415 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 20:47:28,415 INFO ]: Boogie Preprocessor initialized [2018-06-22 20:47:28,439 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,439 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,447 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,447 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,451 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,452 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,453 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (1/1) ... [2018-06-22 20:47:28,460 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 20:47:28,461 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 20:47:28,461 INFO ]: Initializing RCFGBuilder... [2018-06-22 20:47:28,461 INFO ]: RCFGBuilder initialized [2018-06-22 20:47:28,462 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (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 20:47:28,479 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 20:47:28,479 INFO ]: Found specification of procedure False [2018-06-22 20:47:28,479 INFO ]: Found implementation of procedure False [2018-06-22 20:47:28,479 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 20:47:28,479 INFO ]: Found specification of procedure state [2018-06-22 20:47:28,479 INFO ]: Found implementation of procedure state [2018-06-22 20:47:28,479 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 20:47:28,479 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 20:47:28,479 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 20:47:28,746 INFO ]: Using library mode [2018-06-22 20:47:28,746 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:47:28 BoogieIcfgContainer [2018-06-22 20:47:28,746 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 20:47:28,748 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 20:47:28,748 INFO ]: Initializing TraceAbstraction... [2018-06-22 20:47:28,755 INFO ]: TraceAbstraction initialized [2018-06-22 20:47:28,755 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:47:28" (1/3) ... [2018-06-22 20:47:28,756 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2dea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 08:47:28, skipping insertion in model container [2018-06-22 20:47:28,757 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:47:28" (2/3) ... [2018-06-22 20:47:28,757 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2dea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:47:28, skipping insertion in model container [2018-06-22 20:47:28,757 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:47:28" (3/3) ... [2018-06-22 20:47:28,759 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 20:47:28,769 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 20:47:28,781 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 20:47:28,821 INFO ]: Using default assertion order modulation [2018-06-22 20:47:28,822 INFO ]: Interprodecural is true [2018-06-22 20:47:28,822 INFO ]: Hoare is false [2018-06-22 20:47:28,822 INFO ]: Compute interpolants for FPandBP [2018-06-22 20:47:28,822 INFO ]: Backedges is TWOTRACK [2018-06-22 20:47:28,822 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 20:47:28,822 INFO ]: Difference is false [2018-06-22 20:47:28,822 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 20:47:28,822 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 20:47:28,836 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 20:47:28,847 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 20:47:28,847 INFO ]: Found error trace [2018-06-22 20:47:28,848 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:28,848 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:28,852 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 20:47:28,853 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:28,853 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:28,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:28,886 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:47:28,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:28,927 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:29,092 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 20:47:29,094 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 20:47:29,094 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 20:47:29,096 INFO ]: Interpolant automaton has 4 states [2018-06-22 20:47:29,112 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 20:47:29,112 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 20:47:29,115 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 20:47:29,240 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:29,241 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 20:47:29,242 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 20:47:29,243 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 20:47:29,243 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:29,260 INFO ]: With dead ends: 13 [2018-06-22 20:47:29,260 INFO ]: Without dead ends: 13 [2018-06-22 20:47:29,262 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 20:47:29,277 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 20:47:29,296 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 20:47:29,297 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 20:47:29,298 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 20:47:29,299 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 20:47:29,299 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:29,299 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 20:47:29,299 INFO ]: Interpolant automaton has 4 states. [2018-06-22 20:47:29,299 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 20:47:29,300 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 20:47:29,300 INFO ]: Found error trace [2018-06-22 20:47:29,300 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:29,300 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:29,300 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 20:47:29,301 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:29,301 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:29,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:29,301 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:47:29,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:29,328 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:29,909 WARN ]: Spent 427.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2018-06-22 20:47:30,194 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-22 20:47:30,197 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:47:30,197 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:30,197 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 20:47:30,214 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:47:30,269 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:30,280 INFO ]: Computing forward predicates... [2018-06-22 20:47:31,005 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 7 [2018-06-22 20:47:31,435 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:47:31,458 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:31,459 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 20:47:31,459 INFO ]: Interpolant automaton has 9 states [2018-06-22 20:47:31,459 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 20:47:31,459 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 20:47:31,459 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 20:47:31,639 WARN ]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-06-22 20:47:31,784 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:31,784 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 20:47:31,785 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 20:47:31,785 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 20:47:31,785 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:31,785 INFO ]: With dead ends: 15 [2018-06-22 20:47:31,785 INFO ]: Without dead ends: 15 [2018-06-22 20:47:31,786 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-06-22 20:47:31,786 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 20:47:31,789 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 20:47:31,789 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 20:47:31,790 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 20:47:31,790 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 20:47:31,790 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:31,790 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 20:47:31,790 INFO ]: Interpolant automaton has 9 states. [2018-06-22 20:47:31,790 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 20:47:31,791 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 20:47:31,791 INFO ]: Found error trace [2018-06-22 20:47:31,791 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:31,791 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:31,791 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 20:47:31,791 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:31,791 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:31,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:31,792 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:47:31,792 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:31,839 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:32,118 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2018-06-22 20:47:32,351 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:47:32,351 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:32,351 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 20:47:32,360 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 20:47:32,409 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 20:47:32,409 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:32,413 INFO ]: Computing forward predicates... [2018-06-22 20:47:32,980 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:47:33,000 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:33,000 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 20:47:33,000 INFO ]: Interpolant automaton has 13 states [2018-06-22 20:47:33,000 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 20:47:33,001 INFO ]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-06-22 20:47:33,001 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 20:47:33,243 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-06-22 20:47:33,400 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2018-06-22 20:47:33,526 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:33,526 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 20:47:33,526 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 20:47:33,526 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 20:47:33,527 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:33,527 INFO ]: With dead ends: 17 [2018-06-22 20:47:33,527 INFO ]: Without dead ends: 17 [2018-06-22 20:47:33,527 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-22 20:47:33,527 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 20:47:33,529 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 20:47:33,529 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 20:47:33,529 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 20:47:33,529 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 20:47:33,530 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:33,530 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 20:47:33,530 INFO ]: Interpolant automaton has 13 states. [2018-06-22 20:47:33,530 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 20:47:33,533 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 20:47:33,533 INFO ]: Found error trace [2018-06-22 20:47:33,533 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:33,534 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:33,534 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 20:47:33,534 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:33,534 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:33,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:33,534 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:47:33,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:33,573 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:34,063 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2018-06-22 20:47:34,224 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 20:47:34,224 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:34,253 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 20:47:34,262 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 20:47:34,310 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 20:47:34,310 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:34,315 INFO ]: Computing forward predicates... [2018-06-22 20:47:35,552 WARN ]: Spent 826.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2018-06-22 20:47:35,704 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 20:47:35,724 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:35,725 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 20:47:35,725 INFO ]: Interpolant automaton has 17 states [2018-06-22 20:47:35,725 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 20:47:35,725 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-22 20:47:35,725 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 20:47:36,681 WARN ]: Spent 917.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2018-06-22 20:47:37,005 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 48 [2018-06-22 20:47:37,307 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 45 [2018-06-22 20:47:38,100 WARN ]: Spent 756.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2018-06-22 20:47:38,138 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:38,138 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 20:47:38,138 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 20:47:38,138 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 20:47:38,138 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:38,139 INFO ]: With dead ends: 19 [2018-06-22 20:47:38,139 INFO ]: Without dead ends: 19 [2018-06-22 20:47:38,139 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-06-22 20:47:38,140 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 20:47:38,142 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 20:47:38,142 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 20:47:38,143 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 20:47:38,143 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 20:47:38,143 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:38,143 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 20:47:38,143 INFO ]: Interpolant automaton has 17 states. [2018-06-22 20:47:38,143 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 20:47:38,144 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 20:47:38,144 INFO ]: Found error trace [2018-06-22 20:47:38,144 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:38,144 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:38,144 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 20:47:38,144 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:38,144 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:38,145 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:38,145 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:47:38,145 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:38,179 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:38,555 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 20:47:38,555 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:38,555 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 20:47:38,562 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 20:47:38,614 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 20:47:38,614 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:38,618 INFO ]: Computing forward predicates... [2018-06-22 20:47:39,208 INFO ]: Checked inductivity of 36 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 20:47:39,228 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:39,228 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 20:47:39,255 INFO ]: Interpolant automaton has 20 states [2018-06-22 20:47:39,256 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 20:47:39,256 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 20:47:39,256 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 20:47:39,460 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-06-22 20:47:39,722 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-06-22 20:47:40,014 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2018-06-22 20:47:40,053 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:40,053 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 20:47:40,054 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 20:47:40,054 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 20:47:40,054 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:40,055 INFO ]: With dead ends: 21 [2018-06-22 20:47:40,055 INFO ]: Without dead ends: 21 [2018-06-22 20:47:40,056 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2018-06-22 20:47:40,056 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 20:47:40,058 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 20:47:40,059 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 20:47:40,059 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 20:47:40,059 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 20:47:40,059 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:40,059 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 20:47:40,059 INFO ]: Interpolant automaton has 20 states. [2018-06-22 20:47:40,060 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 20:47:40,060 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 20:47:40,060 INFO ]: Found error trace [2018-06-22 20:47:40,060 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:40,060 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:40,061 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 20:47:40,061 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:40,061 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:40,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:40,061 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:47:40,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:40,134 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:40,715 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 20:47:40,716 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:40,716 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 20:47:40,723 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 20:47:40,822 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 20:47:40,822 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:40,827 INFO ]: Computing forward predicates... [2018-06-22 20:47:40,840 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 20:47:40,902 WARN ]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2018-06-22 20:47:42,908 INFO ]: Simplified to disjunction of 5040 conjuctions. [2018-06-22 20:47:42,936 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 20:47:42,973 WARN ]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2018-06-22 20:47:44,894 INFO ]: Simplified to disjunction of 5040 conjuctions. [2018-06-22 20:47:44,908 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 20:47:44,955 WARN ]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2018-06-22 20:47:46,848 INFO ]: Simplified to disjunction of 5040 conjuctions. [2018-06-22 20:47:46,864 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 20:47:46,918 WARN ]: Simplifying disjunction of 5040 conjuctions. This might take some time... [2018-06-22 20:47:49,405 INFO ]: Simplified to disjunction of 5040 conjuctions. [2018-06-22 20:47:50,847 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2018-06-22 20:47:51,216 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2018-06-22 20:47:53,323 WARN ]: Spent 356.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-06-22 20:47:53,574 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 20:47:53,595 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:53,595 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 20:47:53,595 INFO ]: Interpolant automaton has 22 states [2018-06-22 20:47:53,595 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 20:47:53,595 INFO ]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2018-06-22 20:47:53,596 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 20:47:54,239 WARN ]: Spent 594.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2018-06-22 20:47:54,510 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 45 [2018-06-22 20:47:54,968 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 56 [2018-06-22 20:47:55,347 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 64 [2018-06-22 20:47:55,748 WARN ]: Spent 366.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 42 [2018-06-22 20:47:56,315 WARN ]: Spent 523.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 104 [2018-06-22 20:47:56,363 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:47:56,363 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 20:47:56,364 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 20:47:56,364 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 20:47:56,365 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:47:56,365 INFO ]: With dead ends: 23 [2018-06-22 20:47:56,365 INFO ]: Without dead ends: 23 [2018-06-22 20:47:56,365 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2018-06-22 20:47:56,365 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 20:47:56,368 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 20:47:56,368 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 20:47:56,369 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 20:47:56,369 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 20:47:56,369 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:47:56,369 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 20:47:56,369 INFO ]: Interpolant automaton has 22 states. [2018-06-22 20:47:56,369 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 20:47:56,370 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 20:47:56,370 INFO ]: Found error trace [2018-06-22 20:47:56,370 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:47:56,370 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:47:56,371 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 20:47:56,371 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:47:56,371 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:47:56,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:56,371 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:47:56,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:47:56,424 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:57,617 WARN ]: Spent 965.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2018-06-22 20:47:58,070 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 20:47:58,071 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:47:58,071 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 20:47:58,077 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 20:47:58,137 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 20:47:58,137 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:47:58,142 INFO ]: Computing forward predicates... [2018-06-22 20:47:58,782 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2018-06-22 20:47:58,980 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 20:47:59,011 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:47:59,011 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-06-22 20:47:59,011 INFO ]: Interpolant automaton has 29 states [2018-06-22 20:47:59,011 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 20:47:59,012 INFO ]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2018-06-22 20:47:59,012 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 29 states. [2018-06-22 20:47:59,411 WARN ]: Spent 346.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 77 [2018-06-22 20:47:59,634 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 35 [2018-06-22 20:47:59,808 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 31 [2018-06-22 20:47:59,982 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 38 [2018-06-22 20:48:00,174 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 43 [2018-06-22 20:48:00,385 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 52 [2018-06-22 20:48:00,833 WARN ]: Spent 328.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 70 [2018-06-22 20:48:00,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:48:00,878 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 20:48:00,879 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 20:48:00,879 INFO ]: Start accepts. Automaton has 29 states. Word has length 33 [2018-06-22 20:48:00,879 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:48:00,880 INFO ]: With dead ends: 25 [2018-06-22 20:48:00,880 INFO ]: Without dead ends: 25 [2018-06-22 20:48:00,880 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 20:48:00,880 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 20:48:00,886 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 20:48:00,886 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 20:48:00,887 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 20:48:00,887 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 20:48:00,887 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:48:00,887 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 20:48:00,887 INFO ]: Interpolant automaton has 29 states. [2018-06-22 20:48:00,887 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 20:48:00,888 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 20:48:00,888 INFO ]: Found error trace [2018-06-22 20:48:00,888 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:48:00,888 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:48:00,888 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 20:48:00,888 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:48:00,888 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:48:00,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:48:00,889 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:48:00,889 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:48:00,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:48:01,895 WARN ]: Spent 648.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2018-06-22 20:48:02,025 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2018-06-22 20:48:02,776 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2018-06-22 20:48:03,126 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 20:48:03,126 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:48:03,126 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 20:48:03,133 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:48:03,190 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:48:03,196 INFO ]: Computing forward predicates... [2018-06-22 20:48:03,209 WARN ]: expecting exponential blowup for input size 13 [2018-06-22 20:48:03,555 WARN ]: Simplifying disjunction of 45360 conjuctions. This might take some time... Received shutdown request... [2018-06-22 20:48:37,915 INFO ]: Timeout while computing interpolants [2018-06-22 20:48:38,116 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 20:48:38,116 WARN ]: Verification canceled [2018-06-22 20:48:38,121 WARN ]: Timeout [2018-06-22 20:48:38,121 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:48:38 BoogieIcfgContainer [2018-06-22 20:48:38,121 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 20:48:38,122 INFO ]: Toolchain (without parser) took 69765.99 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.6 MB in the beginning and 1.2 GB in the end (delta: -946.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 20:48:38,122 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 20:48:38,122 INFO ]: ChcToBoogie took 51.94 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:48:38,123 INFO ]: Boogie Preprocessor took 44.93 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 255.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:48:38,123 INFO ]: RCFGBuilder took 285.59 ms. Allocated memory is still 306.2 MB. Free memory was 255.6 MB in the beginning and 245.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:48:38,124 INFO ]: TraceAbstraction took 69372.92 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.6 MB in the beginning and 1.2 GB in the end (delta: -961.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 20:48:38,126 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.94 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 44.93 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 255.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 285.59 ms. Allocated memory is still 306.2 MB. Free memory was 255.6 MB in the beginning and 245.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69372.92 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.6 MB in the beginning and 1.2 GB in the end (delta: -961.2 MB). Peak memory consumption was 1.2 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 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 45360 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 69.3s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 8.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 88 SDtfs, 217 SDslu, 637 SDs, 0 SdLazy, 557 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 83020 SizeOfPredicates, 242 NumberOfNonLiveVariables, 1497 ConjunctsInSsa, 360 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 116/406 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/twisted_counters.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_20-48-38-136.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/twisted_counters.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_20-48-38-136.csv Completed graceful shutdown