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/llreve-bench/smt2/loop__while-if.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:12:52,777 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:12:52,779 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:12:52,794 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:12:52,794 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:12:52,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:12:52,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:12:52,801 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:12:52,802 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:12:52,804 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:12:52,805 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:12:52,806 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:12:52,806 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:12:52,807 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:12:52,810 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:12:52,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:12:52,820 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:12:52,822 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:12:52,824 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:12:52,824 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:12:52,829 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:12:52,832 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:12:52,833 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:12:52,833 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:12:52,834 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:12:52,834 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:12:52,835 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:12:52,837 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:12:52,838 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:12:52,838 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:12:52,839 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:12:52,839 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:12:52,840 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:12:52,840 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:12:52,846 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:12:52,847 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:12:52,867 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:12:52,869 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:12:52,869 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:12:52,869 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:12:52,871 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:12:52,871 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:12:52,871 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:12:52,871 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:12:52,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:12:52,872 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:12:52,872 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:12:52,872 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:12:52,872 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:12:52,872 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:12:52,872 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:12:52,875 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:12:52,875 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:12:52,877 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:12:52,877 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:12:52,937 INFO ]: Repository-Root is: /tmp [2018-06-22 02:12:52,954 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:12:52,960 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:12:52,962 INFO ]: Initializing SmtParser... [2018-06-22 02:12:52,962 INFO ]: SmtParser initialized [2018-06-22 02:12:52,963 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 [2018-06-22 02:12:52,964 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 02:12:53,051 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@33b07166 [2018-06-22 02:12:53,203 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__while-if.smt2 [2018-06-22 02:12:53,211 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:12:53,221 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:12:53,224 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:12:53,224 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:12:53,225 INFO ]: ChcToBoogie initialized [2018-06-22 02:12:53,229 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,285 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53 Unit [2018-06-22 02:12:53,285 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:12:53,287 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:12:53,287 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:12:53,287 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:12:53,308 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,308 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,313 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,313 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,316 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,318 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,319 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (1/1) ... [2018-06-22 02:12:53,320 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:12:53,320 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:12:53,320 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:12:53,321 INFO ]: RCFGBuilder initialized [2018-06-22 02:12:53,324 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (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 02:12:53,335 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:12:53,336 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:12:53,336 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:12:53,336 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:12:53,336 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:12:53,336 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 02:12:53,644 INFO ]: Using library mode [2018-06-22 02:12:53,644 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:53 BoogieIcfgContainer [2018-06-22 02:12:53,644 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:12:53,646 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:12:53,646 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:12:53,650 INFO ]: TraceAbstraction initialized [2018-06-22 02:12:53,650 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:53" (1/3) ... [2018-06-22 02:12:53,651 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c414879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:12:53, skipping insertion in model container [2018-06-22 02:12:53,651 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:53" (2/3) ... [2018-06-22 02:12:53,651 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c414879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:12:53, skipping insertion in model container [2018-06-22 02:12:53,651 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:53" (3/3) ... [2018-06-22 02:12:53,653 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:12:53,662 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:12:53,676 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:12:53,767 INFO ]: Using default assertion order modulation [2018-06-22 02:12:53,773 INFO ]: Interprodecural is true [2018-06-22 02:12:53,773 INFO ]: Hoare is false [2018-06-22 02:12:53,773 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:12:53,773 INFO ]: Backedges is TWOTRACK [2018-06-22 02:12:53,773 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:12:53,773 INFO ]: Difference is false [2018-06-22 02:12:53,773 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:12:53,773 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:12:53,789 INFO ]: Start isEmpty. Operand 11 states. [2018-06-22 02:12:53,801 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:12:53,802 INFO ]: Found error trace [2018-06-22 02:12:53,803 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:53,803 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:53,808 INFO ]: Analyzing trace with hash -805090298, now seen corresponding path program 1 times [2018-06-22 02:12:53,810 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:53,811 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:53,857 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:53,857 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:53,857 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:53,921 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:53,989 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:53,992 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:12:53,992 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:12:53,994 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:12:54,008 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:12:54,008 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:12:54,011 INFO ]: Start difference. First operand 11 states. Second operand 3 states. [2018-06-22 02:12:54,075 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:54,075 INFO ]: Finished difference Result 10 states and 16 transitions. [2018-06-22 02:12:54,077 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:12:54,078 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:12:54,079 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:54,091 INFO ]: With dead ends: 10 [2018-06-22 02:12:54,091 INFO ]: Without dead ends: 10 [2018-06-22 02:12:54,094 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 02:12:54,118 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 02:12:54,147 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 02:12:54,148 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 02:12:54,150 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2018-06-22 02:12:54,151 INFO ]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 7 [2018-06-22 02:12:54,151 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:54,151 INFO ]: Abstraction has 10 states and 16 transitions. [2018-06-22 02:12:54,151 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:12:54,152 INFO ]: Start isEmpty. Operand 10 states and 16 transitions. [2018-06-22 02:12:54,152 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:12:54,152 INFO ]: Found error trace [2018-06-22 02:12:54,152 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:54,152 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:54,152 INFO ]: Analyzing trace with hash -803034719, now seen corresponding path program 1 times [2018-06-22 02:12:54,152 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:54,152 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:54,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,154 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:54,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,160 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:54,227 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:54,227 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:12:54,227 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:12:54,228 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:12:54,229 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:12:54,229 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:12:54,229 INFO ]: Start difference. First operand 10 states and 16 transitions. Second operand 3 states. [2018-06-22 02:12:54,252 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:54,253 INFO ]: Finished difference Result 11 states and 17 transitions. [2018-06-22 02:12:54,253 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:12:54,253 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:12:54,253 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:54,254 INFO ]: With dead ends: 11 [2018-06-22 02:12:54,254 INFO ]: Without dead ends: 11 [2018-06-22 02:12:54,255 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 02:12:54,255 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 02:12:54,257 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 02:12:54,257 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:12:54,257 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2018-06-22 02:12:54,257 INFO ]: Start accepts. Automaton has 11 states and 17 transitions. Word has length 7 [2018-06-22 02:12:54,257 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:54,257 INFO ]: Abstraction has 11 states and 17 transitions. [2018-06-22 02:12:54,258 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:12:54,258 INFO ]: Start isEmpty. Operand 11 states and 17 transitions. [2018-06-22 02:12:54,258 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:12:54,258 INFO ]: Found error trace [2018-06-22 02:12:54,258 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:54,258 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:54,258 INFO ]: Analyzing trace with hash 812684117, now seen corresponding path program 1 times [2018-06-22 02:12:54,258 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:54,258 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:54,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,266 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:54,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,316 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:54,375 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:54,375 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:12:54,376 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:12:54,376 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:12:54,376 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:12:54,376 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:12:54,376 INFO ]: Start difference. First operand 11 states and 17 transitions. Second operand 3 states. [2018-06-22 02:12:54,475 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:54,475 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-22 02:12:54,476 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:12:54,476 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-22 02:12:54,476 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:54,476 INFO ]: With dead ends: 12 [2018-06-22 02:12:54,476 INFO ]: Without dead ends: 11 [2018-06-22 02:12:54,477 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 02:12:54,477 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 02:12:54,478 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 02:12:54,478 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:12:54,479 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-06-22 02:12:54,479 INFO ]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-06-22 02:12:54,479 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:54,479 INFO ]: Abstraction has 11 states and 13 transitions. [2018-06-22 02:12:54,479 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:12:54,479 INFO ]: Start isEmpty. Operand 11 states and 13 transitions. [2018-06-22 02:12:54,479 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:12:54,479 INFO ]: Found error trace [2018-06-22 02:12:54,479 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:54,480 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:54,480 INFO ]: Analyzing trace with hash 808066512, now seen corresponding path program 1 times [2018-06-22 02:12:54,480 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:54,480 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:54,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,481 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:54,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:54,502 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:54,613 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:54,613 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:54,613 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 02:12:54,627 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:54,657 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:54,667 INFO ]: Computing forward predicates... [2018-06-22 02:12:55,088 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-06-22 02:12:55,093 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:55,127 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:55,127 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 02:12:55,128 INFO ]: Interpolant automaton has 5 states [2018-06-22 02:12:55,128 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 02:12:55,128 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:12:55,128 INFO ]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-06-22 02:12:55,154 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:55,155 INFO ]: Finished difference Result 11 states and 12 transitions. [2018-06-22 02:12:55,155 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 02:12:55,155 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 02:12:55,155 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:55,156 INFO ]: With dead ends: 11 [2018-06-22 02:12:55,156 INFO ]: Without dead ends: 9 [2018-06-22 02:12:55,156 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:12:55,156 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:12:55,157 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:12:55,157 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:12:55,158 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 02:12:55,158 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2018-06-22 02:12:55,158 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:55,158 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 02:12:55,158 INFO ]: Interpolant automaton has 5 states. [2018-06-22 02:12:55,158 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 02:12:55,158 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:12:55,158 INFO ]: Found error trace [2018-06-22 02:12:55,158 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:55,158 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:55,159 INFO ]: Analyzing trace with hash 873845040, now seen corresponding path program 1 times [2018-06-22 02:12:55,159 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:55,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:55,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:55,161 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:55,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:55,170 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:55,263 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:55,263 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:55,263 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:55,273 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:55,295 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:55,296 INFO ]: Computing forward predicates... [2018-06-22 02:12:55,335 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:55,355 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:55,355 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 02:12:55,356 INFO ]: Interpolant automaton has 4 states [2018-06-22 02:12:55,356 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 02:12:55,356 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 02:12:55,356 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-22 02:12:55,362 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:55,362 INFO ]: Finished difference Result 5 states and 5 transitions. [2018-06-22 02:12:55,363 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 02:12:55,363 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-22 02:12:55,363 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:55,363 INFO ]: With dead ends: 5 [2018-06-22 02:12:55,363 INFO ]: Without dead ends: 0 [2018-06-22 02:12:55,363 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 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 02:12:55,363 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 02:12:55,363 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 02:12:55,363 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 02:12:55,363 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 02:12:55,363 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-06-22 02:12:55,363 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:55,363 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 02:12:55,363 INFO ]: Interpolant automaton has 4 states. [2018-06-22 02:12:55,363 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 02:12:55,363 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 02:12:55,369 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:12:55 BoogieIcfgContainer [2018-06-22 02:12:55,369 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:12:55,370 INFO ]: Toolchain (without parser) took 2157.99 ms. Allocated memory is still 315.1 MB. Free memory was 271.5 MB in the beginning and 215.8 MB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:55,371 INFO ]: SmtParser took 0.21 ms. Allocated memory is still 315.1 MB. Free memory is still 280.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:12:55,371 INFO ]: ChcToBoogie took 61.21 ms. Allocated memory is still 315.1 MB. Free memory was 270.5 MB in the beginning and 268.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:55,372 INFO ]: Boogie Preprocessor took 32.71 ms. Allocated memory is still 315.1 MB. Free memory was 268.5 MB in the beginning and 267.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 02:12:55,373 INFO ]: RCFGBuilder took 323.79 ms. Allocated memory is still 315.1 MB. Free memory was 267.5 MB in the beginning and 259.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:55,373 INFO ]: TraceAbstraction took 1723.19 ms. Allocated memory is still 315.1 MB. Free memory was 258.5 MB in the beginning and 215.8 MB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:55,377 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.21 ms. Allocated memory is still 315.1 MB. Free memory is still 280.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.21 ms. Allocated memory is still 315.1 MB. Free memory was 270.5 MB in the beginning and 268.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.71 ms. Allocated memory is still 315.1 MB. Free memory was 268.5 MB in the beginning and 267.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 323.79 ms. Allocated memory is still 315.1 MB. Free memory was 267.5 MB in the beginning and 259.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1723.19 ms. Allocated memory is still 315.1 MB. Free memory was 258.5 MB in the beginning and 215.8 MB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 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, 11 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 0 SDslu, 46 SDs, 0 SdLazy, 20 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 710 SizeOfPredicates, 7 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 1/5 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/loop__while-if.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-12-55-399.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__while-if.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-12-55-399.csv Received shutdown request...