java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/hopv/lia/fpice/inductive4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:38:18,809 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:38:18,811 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:38:18,823 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:38:18,823 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:38:18,824 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:38:18,826 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:38:18,827 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:38:18,829 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:38:18,830 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:38:18,830 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:38:18,831 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:38:18,831 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:38:18,832 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:38:18,833 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:38:18,834 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:38:18,835 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:38:18,847 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:38:18,848 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:38:18,849 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:38:18,850 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:38:18,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:38:18,853 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:38:18,853 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:38:18,854 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:38:18,861 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:38:18,861 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:38:18,862 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:38:18,863 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 01:38:18,863 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:38:18,864 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:38:18,865 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:38:18,865 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:38:18,869 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:38:18,870 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:38:18,870 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:38:18,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:38:18,894 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:38:18,894 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:38:18,895 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:38:18,896 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:38:18,896 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:38:18,896 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:38:18,896 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:38:18,896 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:38:18,897 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:38:18,897 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:38:18,897 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:38:18,898 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:38:18,898 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:38:18,898 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:38:18,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:38:18,898 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:38:18,900 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:38:18,900 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:38:18,946 INFO ]: Repository-Root is: /tmp [2018-06-22 01:38:18,963 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:38:18,970 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:38:18,972 INFO ]: Initializing SmtParser... [2018-06-22 01:38:18,972 INFO ]: SmtParser initialized [2018-06-22 01:38:18,973 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/fpice/inductive4.smt2 [2018-06-22 01:38:18,974 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 01:38:19,067 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/fpice/inductive4.smt2 unknown [2018-06-22 01:38:19,285 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/fpice/inductive4.smt2 [2018-06-22 01:38:19,291 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:38:19,297 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:38:19,297 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:38:19,297 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:38:19,297 INFO ]: ChcToBoogie initialized [2018-06-22 01:38:19,301 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,356 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19 Unit [2018-06-22 01:38:19,357 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:38:19,357 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:38:19,357 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:38:19,357 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:38:19,372 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,373 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,377 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,377 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,380 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,383 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,384 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... [2018-06-22 01:38:19,387 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:38:19,387 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:38:19,387 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:38:19,387 INFO ]: RCFGBuilder initialized [2018-06-22 01:38:19,388 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 01:38:19,406 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:38:19,406 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:38:19,406 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:38:19,406 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:38:19,406 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:38:19,406 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:38:19,677 INFO ]: Using library mode [2018-06-22 01:38:19,677 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:38:19 BoogieIcfgContainer [2018-06-22 01:38:19,677 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:38:19,679 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:38:19,679 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:38:19,681 INFO ]: TraceAbstraction initialized [2018-06-22 01:38:19,682 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:38:19" (1/3) ... [2018-06-22 01:38:19,682 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff79638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:38:19, skipping insertion in model container [2018-06-22 01:38:19,683 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:38:19" (2/3) ... [2018-06-22 01:38:19,683 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff79638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:38:19, skipping insertion in model container [2018-06-22 01:38:19,683 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:38:19" (3/3) ... [2018-06-22 01:38:19,685 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:38:19,694 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:38:19,702 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:38:19,756 INFO ]: Using default assertion order modulation [2018-06-22 01:38:19,757 INFO ]: Interprodecural is true [2018-06-22 01:38:19,757 INFO ]: Hoare is false [2018-06-22 01:38:19,757 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:38:19,757 INFO ]: Backedges is TWOTRACK [2018-06-22 01:38:19,757 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:38:19,757 INFO ]: Difference is false [2018-06-22 01:38:19,757 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:38:19,757 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:38:19,777 INFO ]: Start isEmpty. Operand 12 states. [2018-06-22 01:38:19,787 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-22 01:38:19,787 INFO ]: Found error trace [2018-06-22 01:38:19,791 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-22 01:38:19,791 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:38:19,796 INFO ]: Analyzing trace with hash -1803227016, now seen corresponding path program 1 times [2018-06-22 01:38:19,798 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:38:19,799 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:38:19,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:19,843 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:38:19,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:19,866 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:19,899 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:38:19,901 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:38:19,901 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 01:38:19,903 INFO ]: Interpolant automaton has 2 states [2018-06-22 01:38:19,915 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 01:38:19,916 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 01:38:19,918 INFO ]: Start difference. First operand 12 states. Second operand 2 states. [2018-06-22 01:38:19,935 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:38:19,935 INFO ]: Finished difference Result 10 states and 12 transitions. [2018-06-22 01:38:19,935 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 01:38:19,936 INFO ]: Start accepts. Automaton has 2 states. Word has length 6 [2018-06-22 01:38:19,937 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:38:19,948 INFO ]: With dead ends: 10 [2018-06-22 01:38:19,948 INFO ]: Without dead ends: 10 [2018-06-22 01:38:19,949 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 01:38:19,961 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 01:38:19,976 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 01:38:19,977 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 01:38:19,978 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-06-22 01:38:19,979 INFO ]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2018-06-22 01:38:19,979 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:38:19,979 INFO ]: Abstraction has 10 states and 12 transitions. [2018-06-22 01:38:19,979 INFO ]: Interpolant automaton has 2 states. [2018-06-22 01:38:19,979 INFO ]: Start isEmpty. Operand 10 states and 12 transitions. [2018-06-22 01:38:19,979 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 01:38:19,979 INFO ]: Found error trace [2018-06-22 01:38:19,979 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:38:19,980 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:38:19,980 INFO ]: Analyzing trace with hash 1994970882, now seen corresponding path program 1 times [2018-06-22 01:38:19,980 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:38:19,980 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:38:19,980 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:19,981 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:38:19,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:19,993 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:20,069 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:38:20,069 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:38:20,069 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:38:20,070 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:38:20,071 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:38:20,071 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:38:20,071 INFO ]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2018-06-22 01:38:20,114 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:38:20,114 INFO ]: Finished difference Result 11 states and 13 transitions. [2018-06-22 01:38:20,114 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:38:20,115 INFO ]: Start accepts. Automaton has 3 states. Word has length 9 [2018-06-22 01:38:20,115 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:38:20,115 INFO ]: With dead ends: 11 [2018-06-22 01:38:20,115 INFO ]: Without dead ends: 11 [2018-06-22 01:38:20,116 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:38:20,116 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 01:38:20,118 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 01:38:20,118 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 01:38:20,118 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-06-22 01:38:20,118 INFO ]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2018-06-22 01:38:20,118 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:38:20,118 INFO ]: Abstraction has 11 states and 13 transitions. [2018-06-22 01:38:20,118 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:38:20,118 INFO ]: Start isEmpty. Operand 11 states and 13 transitions. [2018-06-22 01:38:20,119 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 01:38:20,119 INFO ]: Found error trace [2018-06-22 01:38:20,119 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:38:20,119 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:38:20,119 INFO ]: Analyzing trace with hash -1840378282, now seen corresponding path program 1 times [2018-06-22 01:38:20,119 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:38:20,119 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:38:20,120 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:20,120 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:38:20,120 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:20,139 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:20,253 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:38:20,253 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:38:20,253 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 01:38:20,262 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:38:20,283 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:20,290 INFO ]: Computing forward predicates... [2018-06-22 01:38:20,580 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:38:20,600 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:38:20,600 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 01:38:20,600 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:38:20,600 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:38:20,600 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:38:20,601 INFO ]: Start difference. First operand 11 states and 13 transitions. Second operand 10 states. [2018-06-22 01:38:20,840 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 01:38:20,988 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:38:20,988 INFO ]: Finished difference Result 16 states and 22 transitions. [2018-06-22 01:38:20,988 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:38:20,988 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 01:38:20,988 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:38:20,989 INFO ]: With dead ends: 16 [2018-06-22 01:38:20,989 INFO ]: Without dead ends: 15 [2018-06-22 01:38:20,989 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:38:20,989 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 01:38:20,991 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-06-22 01:38:20,991 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 01:38:20,992 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-06-22 01:38:20,992 INFO ]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2018-06-22 01:38:20,992 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:38:20,992 INFO ]: Abstraction has 13 states and 16 transitions. [2018-06-22 01:38:20,992 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:38:20,992 INFO ]: Start isEmpty. Operand 13 states and 16 transitions. [2018-06-22 01:38:20,992 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 01:38:20,992 INFO ]: Found error trace [2018-06-22 01:38:20,992 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:38:20,992 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:38:20,993 INFO ]: Analyzing trace with hash -477118078, now seen corresponding path program 2 times [2018-06-22 01:38:20,993 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:38:20,993 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:38:20,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:20,994 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:38:20,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:21,011 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:21,095 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:38:21,095 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:38:21,095 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:38:21,095 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:38:21,096 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:38:21,096 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:38:21,096 INFO ]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-06-22 01:38:21,192 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:38:21,192 INFO ]: Finished difference Result 15 states and 19 transitions. [2018-06-22 01:38:21,193 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:38:21,193 INFO ]: Start accepts. Automaton has 4 states. Word has length 11 [2018-06-22 01:38:21,193 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:38:21,193 INFO ]: With dead ends: 15 [2018-06-22 01:38:21,193 INFO ]: Without dead ends: 15 [2018-06-22 01:38:21,194 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:38:21,194 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 01:38:21,195 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 01:38:21,195 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 01:38:21,196 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2018-06-22 01:38:21,196 INFO ]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 11 [2018-06-22 01:38:21,196 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:38:21,196 INFO ]: Abstraction has 15 states and 19 transitions. [2018-06-22 01:38:21,196 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:38:21,196 INFO ]: Start isEmpty. Operand 15 states and 19 transitions. [2018-06-22 01:38:21,196 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:38:21,196 INFO ]: Found error trace [2018-06-22 01:38:21,197 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:38:21,197 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:38:21,198 INFO ]: Analyzing trace with hash -1210941642, now seen corresponding path program 1 times [2018-06-22 01:38:21,198 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:38:21,199 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:38:21,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:21,199 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:38:21,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:38:21,222 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:38:21,266 INFO ]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:38:21,267 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:38:21,267 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:38:21,267 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:38:21,267 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:38:21,267 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:38:21,267 INFO ]: Start difference. First operand 15 states and 19 transitions. Second operand 4 states. [2018-06-22 01:38:21,316 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:38:21,316 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-22 01:38:21,316 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:38:21,316 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 01:38:21,316 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:38:21,316 INFO ]: With dead ends: 7 [2018-06-22 01:38:21,316 INFO ]: Without dead ends: 0 [2018-06-22 01:38:21,317 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:38:21,317 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 01:38:21,317 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 01:38:21,317 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 01:38:21,317 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 01:38:21,317 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2018-06-22 01:38:21,317 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:38:21,317 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 01:38:21,317 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:38:21,317 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 01:38:21,317 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 01:38:21,322 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:38:21 BoogieIcfgContainer [2018-06-22 01:38:21,322 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:38:21,322 INFO ]: Toolchain (without parser) took 2031.34 ms. Allocated memory is still 307.2 MB. Free memory was 262.6 MB in the beginning and 197.1 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.5 MB. Max. memory is 3.6 GB. [2018-06-22 01:38:21,323 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:38:21,324 INFO ]: ChcToBoogie took 59.89 ms. Allocated memory is still 307.2 MB. Free memory was 262.6 MB in the beginning and 260.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:38:21,324 INFO ]: Boogie Preprocessor took 29.45 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 259.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 01:38:21,325 INFO ]: RCFGBuilder took 289.99 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 250.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:38:21,325 INFO ]: TraceAbstraction took 1643.24 ms. Allocated memory is still 307.2 MB. Free memory was 250.6 MB in the beginning and 197.1 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 3.6 GB. [2018-06-22 01:38:21,329 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.89 ms. Allocated memory is still 307.2 MB. Free memory was 262.6 MB in the beginning and 260.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 29.45 ms. Allocated memory is still 307.2 MB. Free memory was 260.6 MB in the beginning and 259.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 289.99 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 250.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1643.24 ms. Allocated memory is still 307.2 MB. Free memory was 250.6 MB in the beginning and 197.1 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 18 SDslu, 46 SDs, 0 SdLazy, 48 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=4, 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, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 1031 SizeOfPredicates, 6 NumberOfNonLiveVariables, 57 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 10/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inductive4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-38-21-341.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inductive4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-38-21-341.csv Received shutdown request...