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/hopv/lia/mochi/twice.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:34:10,639 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:34:10,641 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:34:10,655 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:34:10,655 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:34:10,656 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:34:10,657 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:34:10,659 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:34:10,660 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:34:10,661 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:34:10,662 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:34:10,662 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:34:10,663 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:34:10,664 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:34:10,665 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:34:10,666 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:34:10,667 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:34:10,669 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:34:10,671 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:34:10,671 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:34:10,673 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:34:10,675 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:34:10,675 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:34:10,675 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:34:10,676 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:34:10,677 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:34:10,678 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:34:10,678 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:34:10,679 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:34:10,680 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:34:10,680 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:34:10,681 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:34:10,681 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:34:10,682 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:34:10,683 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:34:10,683 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:34:10,701 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:34:10,701 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:34:10,702 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:34:10,702 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:34:10,703 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:34:10,703 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:34:10,703 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:34:10,703 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:34:10,704 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:34:10,704 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:34:10,704 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:34:10,704 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:34:10,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:34:10,705 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:34:10,705 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:34:10,705 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:34:10,705 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:34:10,705 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:34:10,705 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:34:10,706 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:34:10,706 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:34:10,707 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:34:10,707 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:34:10,746 INFO ]: Repository-Root is: /tmp [2018-06-25 09:34:10,763 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:34:10,769 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:34:10,770 INFO ]: Initializing SmtParser... [2018-06-25 09:34:10,771 INFO ]: SmtParser initialized [2018-06-25 09:34:10,771 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/twice.smt2 [2018-06-25 09:34:10,773 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 09:34:10,862 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/twice.smt2 unknown [2018-06-25 09:34:11,097 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/twice.smt2 [2018-06-25 09:34:11,111 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:34:11,125 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:34:11,125 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:34:11,125 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:34:11,126 INFO ]: ChcToBoogie initialized [2018-06-25 09:34:11,130 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,186 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11 Unit [2018-06-25 09:34:11,186 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:34:11,187 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:34:11,187 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:34:11,187 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:34:11,208 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,208 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,218 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,218 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,221 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,223 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,223 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (1/1) ... [2018-06-25 09:34:11,225 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:34:11,226 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:34:11,226 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:34:11,226 INFO ]: RCFGBuilder initialized [2018-06-25 09:34:11,226 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (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 09:34:11,240 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:34:11,240 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:34:11,240 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:34:11,241 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:34:11,241 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:34:11,241 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 09:34:11,501 INFO ]: Using library mode [2018-06-25 09:34:11,501 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:34:11 BoogieIcfgContainer [2018-06-25 09:34:11,501 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:34:11,503 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:34:11,503 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:34:11,505 INFO ]: TraceAbstraction initialized [2018-06-25 09:34:11,512 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:34:11" (1/3) ... [2018-06-25 09:34:11,513 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdc193b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:34:11, skipping insertion in model container [2018-06-25 09:34:11,513 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:34:11" (2/3) ... [2018-06-25 09:34:11,513 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdc193b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:34:11, skipping insertion in model container [2018-06-25 09:34:11,513 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:34:11" (3/3) ... [2018-06-25 09:34:11,515 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:34:11,525 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:34:11,532 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:34:11,579 INFO ]: Using default assertion order modulation [2018-06-25 09:34:11,580 INFO ]: Interprodecural is true [2018-06-25 09:34:11,580 INFO ]: Hoare is false [2018-06-25 09:34:11,580 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:34:11,580 INFO ]: Backedges is TWOTRACK [2018-06-25 09:34:11,580 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:34:11,580 INFO ]: Difference is false [2018-06-25 09:34:11,580 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:34:11,580 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:34:11,597 INFO ]: Start isEmpty. Operand 15 states. [2018-06-25 09:34:11,612 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:34:11,612 INFO ]: Found error trace [2018-06-25 09:34:11,613 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:34:11,613 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:34:11,620 INFO ]: Analyzing trace with hash -946992894, now seen corresponding path program 1 times [2018-06-25 09:34:11,621 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:34:11,621 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:34:11,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:11,652 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:34:11,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:11,675 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:34:11,705 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:34:11,706 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:34:11,707 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-25 09:34:11,708 INFO ]: Interpolant automaton has 2 states [2018-06-25 09:34:11,718 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-25 09:34:11,719 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-25 09:34:11,720 INFO ]: Start difference. First operand 15 states. Second operand 2 states. [2018-06-25 09:34:11,738 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:34:11,738 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-25 09:34:11,738 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-25 09:34:11,740 INFO ]: Start accepts. Automaton has 2 states. Word has length 7 [2018-06-25 09:34:11,740 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:34:11,748 INFO ]: With dead ends: 13 [2018-06-25 09:34:11,748 INFO ]: Without dead ends: 13 [2018-06-25 09:34:11,749 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 [2018-06-25 09:34:11,761 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 09:34:11,778 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 09:34:11,780 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 09:34:11,780 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-25 09:34:11,782 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2018-06-25 09:34:11,782 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:34:11,782 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-25 09:34:11,782 INFO ]: Interpolant automaton has 2 states. [2018-06-25 09:34:11,782 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-25 09:34:11,783 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 09:34:11,783 INFO ]: Found error trace [2018-06-25 09:34:11,783 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:34:11,783 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:34:11,784 INFO ]: Analyzing trace with hash 657160431, now seen corresponding path program 1 times [2018-06-25 09:34:11,784 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:34:11,784 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:34:11,784 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:11,785 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:34:11,785 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:11,793 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:34:11,893 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:34:11,893 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:34:11,893 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-25 09:34:11,895 INFO ]: Interpolant automaton has 4 states [2018-06-25 09:34:11,895 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 09:34:11,895 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:34:11,897 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2018-06-25 09:34:12,030 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:34:12,030 INFO ]: Finished difference Result 23 states and 25 transitions. [2018-06-25 09:34:12,030 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 09:34:12,030 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-25 09:34:12,031 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:34:12,031 INFO ]: With dead ends: 23 [2018-06-25 09:34:12,031 INFO ]: Without dead ends: 23 [2018-06-25 09:34:12,032 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 [2018-06-25 09:34:12,032 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-25 09:34:12,034 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-25 09:34:12,035 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-25 09:34:12,035 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-06-25 09:34:12,035 INFO ]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 8 [2018-06-25 09:34:12,036 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:34:12,036 INFO ]: Abstraction has 23 states and 25 transitions. [2018-06-25 09:34:12,036 INFO ]: Interpolant automaton has 4 states. [2018-06-25 09:34:12,036 INFO ]: Start isEmpty. Operand 23 states and 25 transitions. [2018-06-25 09:34:12,037 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-25 09:34:12,037 INFO ]: Found error trace [2018-06-25 09:34:12,037 INFO ]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:34:12,037 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:34:12,037 INFO ]: Analyzing trace with hash 178898080, now seen corresponding path program 1 times [2018-06-25 09:34:12,037 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:34:12,037 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:34:12,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:12,038 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:34:12,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:34:12,053 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:34:12,787 INFO ]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-25 09:34:12,787 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:34:12,787 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 09:34:12,794 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:34:12,840 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:34:12,851 INFO ]: Computing forward predicates... [2018-06-25 09:34:13,301 INFO ]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-25 09:34:13,330 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:34:13,330 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-25 09:34:13,331 INFO ]: Interpolant automaton has 17 states [2018-06-25 09:34:13,331 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-25 09:34:13,331 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-25 09:34:13,332 INFO ]: Start difference. First operand 23 states and 25 transitions. Second operand 17 states. [2018-06-25 09:34:14,248 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:34:14,248 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-25 09:34:14,248 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-25 09:34:14,248 INFO ]: Start accepts. Automaton has 17 states. Word has length 18 [2018-06-25 09:34:14,248 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:34:14,248 INFO ]: With dead ends: 23 [2018-06-25 09:34:14,248 INFO ]: Without dead ends: 0 [2018-06-25 09:34:14,249 INFO ]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2018-06-25 09:34:14,250 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 09:34:14,250 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 09:34:14,250 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 09:34:14,250 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 09:34:14,250 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-25 09:34:14,250 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:34:14,250 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 09:34:14,250 INFO ]: Interpolant automaton has 17 states. [2018-06-25 09:34:14,250 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 09:34:14,250 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 09:34:14,255 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:34:14 BoogieIcfgContainer [2018-06-25 09:34:14,255 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:34:14,256 INFO ]: Toolchain (without parser) took 3145.17 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 264.2 MB in the beginning and 255.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 26.9 MB. Max. memory is 3.6 GB. [2018-06-25 09:34:14,258 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:34:14,258 INFO ]: ChcToBoogie took 60.97 ms. Allocated memory is still 306.7 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:34:14,259 INFO ]: Boogie Preprocessor took 38.51 ms. Allocated memory is still 306.7 MB. Free memory was 261.2 MB in the beginning and 260.2 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-25 09:34:14,259 INFO ]: RCFGBuilder took 275.86 ms. Allocated memory is still 306.7 MB. Free memory was 260.2 MB in the beginning and 253.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:34:14,260 INFO ]: TraceAbstraction took 2752.89 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 252.2 MB in the beginning and 255.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 3.6 GB. [2018-06-25 09:34:14,263 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 60.97 ms. Allocated memory is still 306.7 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 38.51 ms. Allocated memory is still 306.7 MB. Free memory was 261.2 MB in the beginning and 260.2 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 275.86 ms. Allocated memory is still 306.7 MB. Free memory was 260.2 MB in the beginning and 253.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 2752.89 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 252.2 MB in the beginning and 255.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.9 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, 15 locations, 1 error locations. SAFE Result, 2.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 43 SDslu, 46 SDs, 0 SdLazy, 95 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 47 ConstructedInterpolants, 3 QuantifiedInterpolants, 2722 SizeOfPredicates, 10 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/12 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/twice.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_09-34-14-275.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/twice.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_09-34-14-275.csv Received shutdown request...