java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:34:31,650 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:34:31,653 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:34:31,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:34:31,668 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:34:31,669 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:34:31,670 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:34:31,676 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:34:31,678 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:34:31,678 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:34:31,680 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:34:31,681 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:34:31,681 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:34:31,682 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:34:31,683 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:34:31,686 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:34:31,687 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:34:31,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:34:31,699 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:34:31,700 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:34:31,701 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:34:31,702 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:34:31,703 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:34:31,703 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:34:31,704 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:34:31,708 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:34:31,708 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:34:31,709 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:34:31,710 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:34:31,710 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:34:31,713 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:34:31,714 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:34:31,714 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:34:31,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:34:31,716 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:34:31,716 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:34:31,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:34:31,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:34:31,729 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:34:31,730 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:34:31,730 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:34:31,731 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:34:31,731 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:34:31,731 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:34:31,731 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:34:31,731 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:34:31,732 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:34:31,732 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:34:31,732 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:34:31,732 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:34:31,732 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:34:31,733 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:34:31,735 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:34:31,735 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:34:31,786 INFO ]: Repository-Root is: /tmp [2018-06-25 13:34:31,800 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:34:31,804 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:34:31,805 INFO ]: Initializing SmtParser... [2018-06-25 13:34:31,805 INFO ]: SmtParser initialized [2018-06-25 13:34:31,807 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 [2018-06-25 13:34:31,809 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 [2018-06-25 13:34:31,898 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 unknown [2018-06-25 13:34:32,090 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple_nest.c.smt2 [2018-06-25 13:34:32,100 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:34:32,108 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:34:32,108 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:34:32,108 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:34:32,109 INFO ]: ChcToBoogie initialized [2018-06-25 13:34:32,112 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,169 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32 Unit [2018-06-25 13:34:32,170 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:34:32,170 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:34:32,170 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:34:32,170 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:34:32,191 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,191 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,197 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,197 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,199 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,202 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,203 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... [2018-06-25 13:34:32,204 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:34:32,216 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:34:32,216 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:34:32,216 INFO ]: RCFGBuilder initialized [2018-06-25 13:34:32,217 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 13:34:32,233 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:34:32,233 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:34:32,233 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:34:32,234 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:34:32,234 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:34:32,234 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:34:32,484 INFO ]: Using library mode [2018-06-25 13:34:32,491 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:34:32 BoogieIcfgContainer [2018-06-25 13:34:32,491 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:34:32,492 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:34:32,492 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:34:32,496 INFO ]: TraceAbstraction initialized [2018-06-25 13:34:32,496 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:34:32" (1/3) ... [2018-06-25 13:34:32,506 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee70b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:34:32, skipping insertion in model container [2018-06-25 13:34:32,506 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:34:32" (2/3) ... [2018-06-25 13:34:32,506 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee70b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:34:32, skipping insertion in model container [2018-06-25 13:34:32,506 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:34:32" (3/3) ... [2018-06-25 13:34:32,509 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:34:32,527 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:34:32,536 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:34:32,615 INFO ]: Using default assertion order modulation [2018-06-25 13:34:32,616 INFO ]: Interprodecural is true [2018-06-25 13:34:32,616 INFO ]: Hoare is false [2018-06-25 13:34:32,616 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:34:32,616 INFO ]: Backedges is TWOTRACK [2018-06-25 13:34:32,616 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:34:32,616 INFO ]: Difference is false [2018-06-25 13:34:32,616 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:34:32,616 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:34:32,629 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:34:32,644 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:34:32,644 INFO ]: Found error trace [2018-06-25 13:34:32,645 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:32,645 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:32,650 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:34:32,652 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:32,652 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:32,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:32,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:32,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:32,732 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:32,779 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:32,782 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:34:32,782 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:34:32,784 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:34:32,795 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:34:32,795 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:34:32,797 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:34:32,855 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:32,855 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:34:32,855 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:34:32,857 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:34:32,857 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:32,865 INFO ]: With dead ends: 9 [2018-06-25 13:34:32,865 INFO ]: Without dead ends: 9 [2018-06-25 13:34:32,867 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:34:32,880 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:34:32,905 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:34:32,906 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:34:32,906 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:34:32,908 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:34:32,908 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:32,908 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:34:32,908 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:34:32,908 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:34:32,908 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:34:32,908 INFO ]: Found error trace [2018-06-25 13:34:32,908 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:32,908 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:32,908 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:34:32,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:32,909 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:32,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:32,909 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:32,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:32,931 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:33,042 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:33,042 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:33,042 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 [2018-06-25 13:34:33,049 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:33,084 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:33,092 INFO ]: Computing forward predicates... [2018-06-25 13:34:33,295 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:33,316 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:33,316 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:34:33,317 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:34:33,317 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:34:33,317 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:34:33,317 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:34:33,400 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:33,401 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:34:33,401 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:34:33,401 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:34:33,401 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:33,402 INFO ]: With dead ends: 10 [2018-06-25 13:34:33,402 INFO ]: Without dead ends: 10 [2018-06-25 13:34:33,403 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:34:33,403 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:34:33,404 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:34:33,404 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:34:33,404 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:34:33,404 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:34:33,404 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:33,404 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:34:33,404 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:34:33,404 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:34:33,406 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:34:33,406 INFO ]: Found error trace [2018-06-25 13:34:33,406 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:33,406 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:33,406 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:34:33,406 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:33,406 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:33,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:33,407 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:33,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:33,473 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:33,674 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:34:33,786 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:33,786 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:33,786 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 [2018-06-25 13:34:33,792 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:34:33,818 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:34:33,818 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:33,820 INFO ]: Computing forward predicates... [2018-06-25 13:34:34,711 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:34,743 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:34,743 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:34:34,743 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:34:34,743 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:34:34,743 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:34:34,743 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:34:35,102 WARN ]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 13:34:35,170 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:35,170 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:34:35,170 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:34:35,170 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:34:35,170 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:35,170 INFO ]: With dead ends: 11 [2018-06-25 13:34:35,171 INFO ]: Without dead ends: 11 [2018-06-25 13:34:35,171 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:34:35,171 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:34:35,172 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:34:35,172 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:34:35,172 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:34:35,172 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:34:35,172 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:35,173 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:34:35,173 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:34:35,173 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:34:35,173 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:34:35,173 INFO ]: Found error trace [2018-06-25 13:34:35,173 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:35,173 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:35,173 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:34:35,173 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:35,173 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:35,174 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:35,174 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:34:35,174 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:35,195 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:35,467 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:35,467 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:35,467 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 [2018-06-25 13:34:35,475 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:34:35,529 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:34:35,529 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:35,532 INFO ]: Computing forward predicates... [2018-06-25 13:34:35,918 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:35,939 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:35,939 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:34:35,939 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:34:35,939 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:34:35,939 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:34:35,939 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:34:36,033 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:36,034 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:34:36,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:34:36,034 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:34:36,034 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:36,034 INFO ]: With dead ends: 12 [2018-06-25 13:34:36,034 INFO ]: Without dead ends: 12 [2018-06-25 13:34:36,035 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:34:36,035 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:34:36,036 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:34:36,036 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:34:36,036 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:34:36,037 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:34:36,037 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:36,037 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:34:36,037 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:34:36,037 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:34:36,037 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:34:36,037 INFO ]: Found error trace [2018-06-25 13:34:36,037 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:36,037 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:36,037 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-25 13:34:36,037 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:36,037 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:36,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:36,038 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:34:36,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:36,104 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:36,384 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:36,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:36,384 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 [2018-06-25 13:34:36,394 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:34:36,433 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:34:36,433 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:36,436 INFO ]: Computing forward predicates... [2018-06-25 13:34:37,387 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-06-25 13:34:39,127 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:39,158 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:39,158 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-06-25 13:34:39,158 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:34:39,159 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:34:39,159 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:34:39,159 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2018-06-25 13:34:39,445 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 7 [2018-06-25 13:34:39,626 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:39,626 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:34:39,626 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:34:39,626 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-25 13:34:39,626 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:39,627 INFO ]: With dead ends: 13 [2018-06-25 13:34:39,627 INFO ]: Without dead ends: 13 [2018-06-25 13:34:39,627 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:34:39,627 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:34:39,628 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:34:39,628 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:34:39,629 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:34:39,629 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:34:39,629 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:39,629 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:34:39,629 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:34:39,629 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:34:39,630 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:34:39,630 INFO ]: Found error trace [2018-06-25 13:34:39,630 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:39,630 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:39,630 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-25 13:34:39,630 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:39,630 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:39,631 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:39,631 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:34:39,631 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:39,682 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:39,954 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 13:34:40,021 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:40,021 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:40,021 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 [2018-06-25 13:34:40,026 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:34:40,069 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:34:40,069 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:40,072 INFO ]: Computing forward predicates... [2018-06-25 13:34:44,766 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:44,785 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:44,785 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-25 13:34:44,785 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:34:44,786 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:34:44,786 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:34:44,786 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-06-25 13:34:45,052 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:45,052 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:34:45,052 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:34:45,052 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-25 13:34:45,052 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:45,052 INFO ]: With dead ends: 14 [2018-06-25 13:34:45,052 INFO ]: Without dead ends: 14 [2018-06-25 13:34:45,053 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-06-25 13:34:45,053 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:34:45,054 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:34:45,054 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:34:45,054 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:34:45,054 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:34:45,054 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:45,054 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:34:45,055 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:34:45,055 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:34:45,055 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:34:45,055 INFO ]: Found error trace [2018-06-25 13:34:45,055 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:45,055 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:45,055 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-25 13:34:45,055 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:45,055 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:45,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:45,056 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:34:45,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:45,092 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:45,253 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:45,253 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:45,253 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) [2018-06-25 13:34:45,269 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:34:45,308 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:34:45,309 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:45,311 INFO ]: Computing forward predicates... [2018-06-25 13:34:46,477 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:34:52,765 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:52,785 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:52,785 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-25 13:34:52,785 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:34:52,785 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:34:52,786 INFO ]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:34:52,786 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-25 13:34:53,090 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-06-25 13:34:53,200 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:53,200 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:34:53,200 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:34:53,200 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-25 13:34:53,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:53,201 INFO ]: With dead ends: 15 [2018-06-25 13:34:53,201 INFO ]: Without dead ends: 15 [2018-06-25 13:34:53,201 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-06-25 13:34:53,201 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:34:53,202 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:34:53,202 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:34:53,203 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:34:53,203 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:34:53,203 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:53,203 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:34:53,203 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:34:53,203 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:34:53,203 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:34:53,203 INFO ]: Found error trace [2018-06-25 13:34:53,203 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:53,203 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:53,203 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-25 13:34:53,203 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:53,203 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:53,206 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:53,206 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:34:53,206 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:53,256 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:53,521 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:53,521 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:53,521 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 [2018-06-25 13:34:53,541 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:53,585 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:53,590 INFO ]: Computing forward predicates... [2018-06-25 13:34:53,701 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:34:54,299 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:34:54,812 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:34:56,190 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:56,210 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:34:56,210 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-25 13:34:56,210 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:34:56,210 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:34:56,210 INFO ]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:34:56,210 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-25 13:34:56,679 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:34:56,680 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-25 13:34:56,680 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 13:34:56,680 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-25 13:34:56,680 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:34:56,680 INFO ]: With dead ends: 17 [2018-06-25 13:34:56,680 INFO ]: Without dead ends: 17 [2018-06-25 13:34:56,681 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2018-06-25 13:34:56,681 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-25 13:34:56,682 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-25 13:34:56,682 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-25 13:34:56,682 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-25 13:34:56,682 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-06-25 13:34:56,683 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:34:56,683 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-25 13:34:56,683 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:34:56,683 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-25 13:34:56,683 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 13:34:56,683 INFO ]: Found error trace [2018-06-25 13:34:56,683 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:34:56,683 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:34:56,683 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-25 13:34:56,683 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:34:56,683 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:34:56,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:56,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:34:56,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:34:56,741 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:57,088 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 1 [2018-06-25 13:34:57,737 WARN ]: Spent 577.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-25 13:34:58,045 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:34:58,045 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:34:58,045 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:34:58,051 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:34:58,099 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:34:58,099 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:34:58,103 INFO ]: Computing forward predicates... [2018-06-25 13:34:58,418 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:34:58,426 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:34:58,437 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:34:58,443 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:34:58,459 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:00,086 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:00,105 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:00,105 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-25 13:35:00,106 INFO ]: Interpolant automaton has 20 states [2018-06-25 13:35:00,106 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-25 13:35:00,106 INFO ]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2018-06-25 13:35:00,106 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-06-25 13:35:00,314 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2018-06-25 13:35:00,635 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-25 13:35:00,810 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-06-25 13:35:01,597 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-25 13:35:01,598 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:01,598 INFO ]: Finished difference Result 22 states and 22 transitions. [2018-06-25 13:35:01,598 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-25 13:35:01,598 INFO ]: Start accepts. Automaton has 20 states. Word has length 16 [2018-06-25 13:35:01,598 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:01,599 INFO ]: With dead ends: 22 [2018-06-25 13:35:01,599 INFO ]: Without dead ends: 22 [2018-06-25 13:35:01,599 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=366, Invalid=756, Unknown=0, NotChecked=0, Total=1122 [2018-06-25 13:35:01,599 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-25 13:35:01,601 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-06-25 13:35:01,601 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-25 13:35:01,601 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-06-25 13:35:01,602 INFO ]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2018-06-25 13:35:01,602 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:01,602 INFO ]: Abstraction has 22 states and 22 transitions. [2018-06-25 13:35:01,602 INFO ]: Interpolant automaton has 20 states. [2018-06-25 13:35:01,602 INFO ]: Start isEmpty. Operand 22 states and 22 transitions. [2018-06-25 13:35:01,602 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-25 13:35:01,602 INFO ]: Found error trace [2018-06-25 13:35:01,602 INFO ]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:01,602 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:01,602 INFO ]: Analyzing trace with hash 781068044, now seen corresponding path program 9 times [2018-06-25 13:35:01,603 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:01,603 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:01,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:01,603 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:01,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:01,664 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:02,150 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:02,150 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:02,150 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:35:02,156 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:35:02,230 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-06-25 13:35:02,230 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:02,235 INFO ]: Computing forward predicates... [2018-06-25 13:35:05,435 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:08,380 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:08,400 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:08,441 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-06-25 13:35:08,441 INFO ]: Interpolant automaton has 26 states [2018-06-25 13:35:08,441 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-25 13:35:08,441 INFO ]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2018-06-25 13:35:08,442 INFO ]: Start difference. First operand 22 states and 22 transitions. Second operand 26 states. [2018-06-25 13:35:08,688 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2018-06-25 13:35:08,838 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2018-06-25 13:35:09,007 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-25 13:35:09,147 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2018-06-25 13:35:09,285 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2018-06-25 13:35:09,451 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-06-25 13:35:09,621 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2018-06-25 13:35:10,473 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:10,473 INFO ]: Finished difference Result 27 states and 27 transitions. [2018-06-25 13:35:10,474 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-25 13:35:10,474 INFO ]: Start accepts. Automaton has 26 states. Word has length 21 [2018-06-25 13:35:10,474 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:10,474 INFO ]: With dead ends: 27 [2018-06-25 13:35:10,474 INFO ]: Without dead ends: 27 [2018-06-25 13:35:10,475 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=582, Invalid=1398, Unknown=0, NotChecked=0, Total=1980 [2018-06-25 13:35:10,475 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-25 13:35:10,477 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-25 13:35:10,478 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-25 13:35:10,478 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-06-25 13:35:10,478 INFO ]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2018-06-25 13:35:10,478 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:10,478 INFO ]: Abstraction has 27 states and 27 transitions. [2018-06-25 13:35:10,478 INFO ]: Interpolant automaton has 26 states. [2018-06-25 13:35:10,478 INFO ]: Start isEmpty. Operand 27 states and 27 transitions. [2018-06-25 13:35:10,479 INFO ]: Finished isEmpty. Found accepting run of length 27 [2018-06-25 13:35:10,479 INFO ]: Found error trace [2018-06-25 13:35:10,479 INFO ]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:10,479 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:10,479 INFO ]: Analyzing trace with hash 389545748, now seen corresponding path program 10 times [2018-06-25 13:35:10,479 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:10,479 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:10,480 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:10,480 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:10,480 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:10,573 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:11,212 WARN ]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:35:11,525 WARN ]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 13:35:11,998 INFO ]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:11,998 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:11,998 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:35:12,004 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:35:12,086 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:35:12,086 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:12,101 INFO ]: Computing forward predicates... [2018-06-25 13:35:12,318 WARN ]: expecting exponential blowup for input size 9 [2018-06-25 13:35:20,076 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 19 [2018-06-25 13:35:20,617 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2018-06-25 13:35:21,581 INFO ]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:21,601 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:21,601 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2018-06-25 13:35:21,601 INFO ]: Interpolant automaton has 40 states [2018-06-25 13:35:21,602 INFO ]: Constructing interpolant automaton starting with 40 interpolants. [2018-06-25 13:35:21,602 INFO ]: CoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2018-06-25 13:35:21,602 INFO ]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states. [2018-06-25 13:35:21,793 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2018-06-25 13:35:21,949 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2018-06-25 13:35:22,118 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2018-06-25 13:35:22,281 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2018-06-25 13:35:22,473 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-06-25 13:35:22,729 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-06-25 13:35:22,976 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2018-06-25 13:35:23,347 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2018-06-25 13:35:23,548 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2018-06-25 13:35:23,798 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2018-06-25 13:35:24,034 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2018-06-25 13:35:24,303 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-06-25 13:35:24,571 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2018-06-25 13:35:24,823 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2018-06-25 13:35:24,968 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-06-25 13:35:25,304 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2018-06-25 13:35:25,305 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:25,305 INFO ]: Finished difference Result 29 states and 29 transitions. [2018-06-25 13:35:25,305 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-06-25 13:35:25,306 INFO ]: Start accepts. Automaton has 40 states. Word has length 26 [2018-06-25 13:35:25,306 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:25,306 INFO ]: With dead ends: 29 [2018-06-25 13:35:25,306 INFO ]: Without dead ends: 29 [2018-06-25 13:35:25,307 INFO ]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=898, Invalid=2642, Unknown=0, NotChecked=0, Total=3540 [2018-06-25 13:35:25,307 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-25 13:35:25,308 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-25 13:35:25,308 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-25 13:35:25,309 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-06-25 13:35:25,309 INFO ]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-06-25 13:35:25,312 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:25,312 INFO ]: Abstraction has 29 states and 29 transitions. [2018-06-25 13:35:25,312 INFO ]: Interpolant automaton has 40 states. [2018-06-25 13:35:25,312 INFO ]: Start isEmpty. Operand 29 states and 29 transitions. [2018-06-25 13:35:25,312 INFO ]: Finished isEmpty. Found accepting run of length 29 [2018-06-25 13:35:25,312 INFO ]: Found error trace [2018-06-25 13:35:25,312 INFO ]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:25,312 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:25,312 INFO ]: Analyzing trace with hash 631070228, now seen corresponding path program 11 times [2018-06-25 13:35:25,312 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:25,312 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:25,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:25,313 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:25,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:25,463 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:26,227 INFO ]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:26,228 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:26,228 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:35:26,233 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:35:26,334 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-06-25 13:35:26,334 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:26,341 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:35:30,956 INFO ]: Timeout while computing interpolants [2018-06-25 13:35:31,157 WARN ]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:35:31,157 WARN ]: Verification canceled [2018-06-25 13:35:31,161 WARN ]: Timeout [2018-06-25 13:35:31,161 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:35:31 BoogieIcfgContainer [2018-06-25 13:35:31,161 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:35:31,162 INFO ]: Toolchain (without parser) took 59061.32 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 256.4 MB in the beginning and 842.4 MB in the end (delta: -586.1 MB). Peak memory consumption was 613.5 MB. Max. memory is 3.6 GB. [2018-06-25 13:35:31,163 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:35:31,163 INFO ]: ChcToBoogie took 61.50 ms. Allocated memory is still 302.0 MB. Free memory was 256.4 MB in the beginning and 254.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:35:31,164 INFO ]: Boogie Preprocessor took 34.30 ms. Allocated memory is still 302.0 MB. Free memory was 254.4 MB in the beginning and 253.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 13:35:31,164 INFO ]: RCFGBuilder took 274.97 ms. Allocated memory is still 302.0 MB. Free memory was 253.4 MB in the beginning and 244.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. [2018-06-25 13:35:31,164 INFO ]: TraceAbstraction took 58669.22 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.3 MB in the beginning and 842.4 MB in the end (delta: -598.2 MB). Peak memory consumption was 601.4 MB. Max. memory is 3.6 GB. [2018-06-25 13:35:31,167 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.50 ms. Allocated memory is still 302.0 MB. Free memory was 256.4 MB in the beginning and 254.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.30 ms. Allocated memory is still 302.0 MB. Free memory was 254.4 MB in the beginning and 253.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 274.97 ms. Allocated memory is still 302.0 MB. Free memory was 253.4 MB in the beginning and 244.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58669.22 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.3 MB in the beginning and 842.4 MB in the end (delta: -598.2 MB). Peak memory consumption was 601.4 MB. 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 29 with TraceHistMax 21, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 58.5s OverallTime, 12 OverallIterations, 21 TraceHistogramMax, 9.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 77 SDtfs, 64 SDslu, 386 SDs, 0 SdLazy, 159 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 26 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 17.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=11, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 41.5s InterpolantComputationTime, 287 NumberOfCodeBlocks, 287 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 36320 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2210 ConjunctsInSsa, 607 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 0/848 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/simple_nest.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-35-31-177.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_nest.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-35-31-177.csv Completed graceful shutdown