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/mc91_98.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:32:30,281 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:32:30,283 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:32:30,296 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:32:30,296 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:32:30,297 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:32:30,300 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:32:30,302 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:32:30,304 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:32:30,305 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:32:30,306 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:32:30,306 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:32:30,307 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:32:30,309 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:32:30,310 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:32:30,311 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:32:30,312 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:32:30,322 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:32:30,323 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:32:30,324 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:32:30,325 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:32:30,330 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:32:30,330 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:32:30,330 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:32:30,331 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:32:30,331 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:32:30,332 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:32:30,333 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:32:30,335 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:32:30,335 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:32:30,336 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:32:30,336 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:32:30,336 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:32:30,337 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:32:30,337 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:32:30,340 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:32:30,361 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:32:30,361 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:32:30,361 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:32:30,363 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:32:30,364 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:32:30,364 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:32:30,365 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:32:30,365 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:32:30,365 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:32:30,365 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:32:30,365 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:32:30,366 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:32:30,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:32:30,366 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:32:30,366 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:32:30,366 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:32:30,366 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:32:30,367 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:32:30,368 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:32:30,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:32:30,368 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:32:30,369 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:32:30,370 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:32:30,414 INFO ]: Repository-Root is: /tmp [2018-06-25 09:32:30,424 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:32:30,430 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:32:30,431 INFO ]: Initializing SmtParser... [2018-06-25 09:32:30,432 INFO ]: SmtParser initialized [2018-06-25 09:32:30,432 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/mc91_98.smt2 [2018-06-25 09:32:30,433 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 09:32:30,521 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/mc91_98.smt2 unknown [2018-06-25 09:32:30,727 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/mc91_98.smt2 [2018-06-25 09:32:30,731 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:32:30,738 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:32:30,739 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:32:30,739 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:32:30,739 INFO ]: ChcToBoogie initialized [2018-06-25 09:32:30,742 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,788 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30 Unit [2018-06-25 09:32:30,788 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:32:30,789 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:32:30,789 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:32:30,789 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:32:30,812 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,813 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,818 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,818 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,820 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,823 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,824 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (1/1) ... [2018-06-25 09:32:30,825 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:32:30,826 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:32:30,826 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:32:30,826 INFO ]: RCFGBuilder initialized [2018-06-25 09:32:30,827 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (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 09:32:30,840 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:32:30,840 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:32:30,840 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:32:30,840 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:32:30,840 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:32:30,840 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 09:32:31,069 INFO ]: Using library mode [2018-06-25 09:32:31,070 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:32:31 BoogieIcfgContainer [2018-06-25 09:32:31,070 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:32:31,076 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:32:31,076 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:32:31,079 INFO ]: TraceAbstraction initialized [2018-06-25 09:32:31,079 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:32:30" (1/3) ... [2018-06-25 09:32:31,080 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1a1a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:32:31, skipping insertion in model container [2018-06-25 09:32:31,084 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:32:30" (2/3) ... [2018-06-25 09:32:31,085 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1a1a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:32:31, skipping insertion in model container [2018-06-25 09:32:31,085 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:32:31" (3/3) ... [2018-06-25 09:32:31,087 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:32:31,096 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:32:31,116 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:32:31,166 INFO ]: Using default assertion order modulation [2018-06-25 09:32:31,166 INFO ]: Interprodecural is true [2018-06-25 09:32:31,166 INFO ]: Hoare is false [2018-06-25 09:32:31,166 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:32:31,166 INFO ]: Backedges is TWOTRACK [2018-06-25 09:32:31,166 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:32:31,166 INFO ]: Difference is false [2018-06-25 09:32:31,166 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:32:31,166 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:32:31,179 INFO ]: Start isEmpty. Operand 13 states. [2018-06-25 09:32:31,189 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:32:31,189 INFO ]: Found error trace [2018-06-25 09:32:31,190 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:32:31,190 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:32:31,193 INFO ]: Analyzing trace with hash -948571817, now seen corresponding path program 1 times [2018-06-25 09:32:31,195 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:32:31,195 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:32:31,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,227 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:32:31,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,255 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:31,337 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:32:31,338 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:32:31,339 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-25 09:32:31,340 INFO ]: Interpolant automaton has 4 states [2018-06-25 09:32:31,350 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 09:32:31,351 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:32:31,352 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-25 09:32:31,508 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:32:31,508 INFO ]: Finished difference Result 19 states and 23 transitions. [2018-06-25 09:32:31,509 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 09:32:31,510 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-25 09:32:31,510 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:32:31,517 INFO ]: With dead ends: 19 [2018-06-25 09:32:31,517 INFO ]: Without dead ends: 19 [2018-06-25 09:32:31,519 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 09:32:31,534 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-25 09:32:31,557 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-25 09:32:31,559 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-25 09:32:31,560 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-06-25 09:32:31,561 INFO ]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 7 [2018-06-25 09:32:31,562 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:32:31,563 INFO ]: Abstraction has 19 states and 23 transitions. [2018-06-25 09:32:31,563 INFO ]: Interpolant automaton has 4 states. [2018-06-25 09:32:31,563 INFO ]: Start isEmpty. Operand 19 states and 23 transitions. [2018-06-25 09:32:31,564 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 09:32:31,564 INFO ]: Found error trace [2018-06-25 09:32:31,564 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:32:31,564 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:32:31,564 INFO ]: Analyzing trace with hash 708877607, now seen corresponding path program 1 times [2018-06-25 09:32:31,564 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:32:31,564 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:32:31,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,565 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:32:31,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,575 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:31,606 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:32:31,607 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:32:31,607 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:32:31,608 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:32:31,608 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:32:31,608 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:32:31,608 INFO ]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2018-06-25 09:32:31,620 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:32:31,621 INFO ]: Finished difference Result 25 states and 31 transitions. [2018-06-25 09:32:31,621 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:32:31,621 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-25 09:32:31,621 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:32:31,622 INFO ]: With dead ends: 25 [2018-06-25 09:32:31,622 INFO ]: Without dead ends: 25 [2018-06-25 09:32:31,623 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 09:32:31,623 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-25 09:32:31,627 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-06-25 09:32:31,628 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-25 09:32:31,628 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-06-25 09:32:31,629 INFO ]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2018-06-25 09:32:31,629 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:32:31,629 INFO ]: Abstraction has 21 states and 25 transitions. [2018-06-25 09:32:31,629 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:32:31,629 INFO ]: Start isEmpty. Operand 21 states and 25 transitions. [2018-06-25 09:32:31,629 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 09:32:31,629 INFO ]: Found error trace [2018-06-25 09:32:31,630 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:32:31,630 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:32:31,630 INFO ]: Analyzing trace with hash 2019645580, now seen corresponding path program 1 times [2018-06-25 09:32:31,630 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:32:31,630 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:32:31,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,630 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:32:31,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:31,653 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:31,950 INFO ]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-25 09:32:31,950 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:32:31,950 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 09:32:31,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:32:32,002 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:32,010 INFO ]: Computing forward predicates... [2018-06-25 09:32:32,772 INFO ]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-25 09:32:32,809 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:32:32,809 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-25 09:32:32,809 INFO ]: Interpolant automaton has 13 states [2018-06-25 09:32:32,810 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-25 09:32:32,810 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-25 09:32:32,810 INFO ]: Start difference. First operand 21 states and 25 transitions. Second operand 13 states. [2018-06-25 09:32:33,532 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 09:32:33,616 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:32:33,616 INFO ]: Finished difference Result 42 states and 58 transitions. [2018-06-25 09:32:33,617 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 09:32:33,617 INFO ]: Start accepts. Automaton has 13 states. Word has length 16 [2018-06-25 09:32:33,617 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:32:33,620 INFO ]: With dead ends: 42 [2018-06-25 09:32:33,620 INFO ]: Without dead ends: 42 [2018-06-25 09:32:33,622 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-06-25 09:32:33,622 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-25 09:32:33,629 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 36. [2018-06-25 09:32:33,629 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-25 09:32:33,631 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2018-06-25 09:32:33,631 INFO ]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 16 [2018-06-25 09:32:33,631 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:32:33,631 INFO ]: Abstraction has 36 states and 50 transitions. [2018-06-25 09:32:33,631 INFO ]: Interpolant automaton has 13 states. [2018-06-25 09:32:33,631 INFO ]: Start isEmpty. Operand 36 states and 50 transitions. [2018-06-25 09:32:33,633 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-25 09:32:33,633 INFO ]: Found error trace [2018-06-25 09:32:33,633 INFO ]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-06-25 09:32:33,633 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:32:33,633 INFO ]: Analyzing trace with hash -885179279, now seen corresponding path program 2 times [2018-06-25 09:32:33,633 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:32:33,634 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:32:33,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:33,634 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:32:33,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:33,649 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:33,820 INFO ]: Checked inductivity of 24 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-25 09:32:33,820 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:32:33,820 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 09:32:33,826 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 09:32:33,858 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 09:32:33,858 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:33,862 INFO ]: Computing forward predicates... [2018-06-25 09:32:34,060 INFO ]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-25 09:32:34,080 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:32:34,080 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2018-06-25 09:32:34,080 INFO ]: Interpolant automaton has 20 states [2018-06-25 09:32:34,080 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-25 09:32:34,080 INFO ]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-06-25 09:32:34,081 INFO ]: Start difference. First operand 36 states and 50 transitions. Second operand 20 states. [2018-06-25 09:32:36,509 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:32:36,509 INFO ]: Finished difference Result 105 states and 190 transitions. [2018-06-25 09:32:36,510 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-06-25 09:32:36,510 INFO ]: Start accepts. Automaton has 20 states. Word has length 24 [2018-06-25 09:32:36,510 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:32:36,514 INFO ]: With dead ends: 105 [2018-06-25 09:32:36,514 INFO ]: Without dead ends: 81 [2018-06-25 09:32:36,516 INFO ]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=845, Invalid=4411, Unknown=0, NotChecked=0, Total=5256 [2018-06-25 09:32:36,516 INFO ]: Start minimizeSevpa. Operand 81 states. [2018-06-25 09:32:36,532 INFO ]: Finished minimizeSevpa. Reduced states from 81 to 48. [2018-06-25 09:32:36,532 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-25 09:32:36,535 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2018-06-25 09:32:36,535 INFO ]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 24 [2018-06-25 09:32:36,535 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:32:36,535 INFO ]: Abstraction has 48 states and 74 transitions. [2018-06-25 09:32:36,535 INFO ]: Interpolant automaton has 20 states. [2018-06-25 09:32:36,535 INFO ]: Start isEmpty. Operand 48 states and 74 transitions. [2018-06-25 09:32:36,537 INFO ]: Finished isEmpty. Found accepting run of length 33 [2018-06-25 09:32:36,537 INFO ]: Found error trace [2018-06-25 09:32:36,537 INFO ]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-06-25 09:32:36,538 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:32:36,538 INFO ]: Analyzing trace with hash 417738838, now seen corresponding path program 3 times [2018-06-25 09:32:36,538 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:32:36,538 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:32:36,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:36,539 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:32:36,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:32:36,559 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:36,658 INFO ]: Checked inductivity of 51 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-06-25 09:32:36,658 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:32:36,658 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 09:32:36,676 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 09:32:36,743 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 09:32:36,743 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:32:36,747 INFO ]: Computing forward predicates... [2018-06-25 09:32:37,119 INFO ]: Checked inductivity of 51 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-25 09:32:37,138 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:32:37,138 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2018-06-25 09:32:37,138 INFO ]: Interpolant automaton has 20 states [2018-06-25 09:32:37,138 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-25 09:32:37,139 INFO ]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-06-25 09:32:37,139 INFO ]: Start difference. First operand 48 states and 74 transitions. Second operand 20 states. [2018-06-25 09:32:37,338 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:32:37,338 INFO ]: Finished difference Result 57 states and 80 transitions. [2018-06-25 09:32:37,339 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-25 09:32:37,339 INFO ]: Start accepts. Automaton has 20 states. Word has length 32 [2018-06-25 09:32:37,339 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:32:37,339 INFO ]: With dead ends: 57 [2018-06-25 09:32:37,339 INFO ]: Without dead ends: 0 [2018-06-25 09:32:37,340 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2018-06-25 09:32:37,340 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 09:32:37,340 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 09:32:37,340 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 09:32:37,340 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 09:32:37,340 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2018-06-25 09:32:37,340 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:32:37,340 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 09:32:37,340 INFO ]: Interpolant automaton has 20 states. [2018-06-25 09:32:37,340 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 09:32:37,340 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 09:32:37,344 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:32:37 BoogieIcfgContainer [2018-06-25 09:32:37,344 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:32:37,345 INFO ]: Toolchain (without parser) took 6613.41 ms. Allocated memory was 308.8 MB in the beginning and 380.6 MB in the end (delta: 71.8 MB). Free memory was 266.2 MB in the beginning and 308.8 MB in the end (delta: -42.7 MB). Peak memory consumption was 29.2 MB. Max. memory is 3.6 GB. [2018-06-25 09:32:37,346 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:32:37,346 INFO ]: ChcToBoogie took 49.29 ms. Allocated memory is still 308.8 MB. Free memory was 265.2 MB in the beginning and 263.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:32:37,347 INFO ]: Boogie Preprocessor took 36.68 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 262.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-25 09:32:37,347 INFO ]: RCFGBuilder took 243.51 ms. Allocated memory is still 308.8 MB. Free memory was 262.1 MB in the beginning and 255.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:32:37,348 INFO ]: TraceAbstraction took 6268.49 ms. Allocated memory was 308.8 MB in the beginning and 380.6 MB in the end (delta: 71.8 MB). Free memory was 255.1 MB in the beginning and 308.8 MB in the end (delta: -53.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 3.6 GB. [2018-06-25 09:32:37,351 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 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.29 ms. Allocated memory is still 308.8 MB. Free memory was 265.2 MB in the beginning and 263.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.68 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 262.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 243.51 ms. Allocated memory is still 308.8 MB. Free memory was 262.1 MB in the beginning and 255.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6268.49 ms. Allocated memory was 308.8 MB in the beginning and 380.6 MB in the end (delta: 71.8 MB). Free memory was 255.1 MB in the beginning and 308.8 MB in the end (delta: -53.7 MB). Peak memory consumption was 18.1 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, 13 locations, 1 error locations. SAFE Result, 6.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 3.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 58 SDtfs, 111 SDslu, 201 SDs, 0 SdLazy, 810 SolverSat, 379 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 43 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 12865 SizeOfPredicates, 35 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 100/164 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/mc91_98.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_09-32-37-362.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/mc91_98.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_09-32-37-362.csv Received shutdown request...