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/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:50:53,241 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:50:53,243 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:50:53,260 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:50:53,260 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:50:53,261 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:50:53,262 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:50:53,264 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:50:53,266 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:50:53,268 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:50:53,269 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:50:53,270 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:50:53,270 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:50:53,272 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:50:53,275 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:50:53,276 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:50:53,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:50:53,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:50:53,288 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:50:53,291 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:50:53,293 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:50:53,295 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:50:53,297 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:50:53,297 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:50:53,298 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:50:53,299 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:50:53,300 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:50:53,300 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:50:53,302 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:50:53,302 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:50:53,303 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:50:53,303 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:50:53,304 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:50:53,304 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:50:53,307 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:50:53,308 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:50:53,330 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:50:53,330 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:50:53,330 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:50:53,330 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:50:53,332 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:50:53,332 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:50:53,332 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:50:53,333 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:50:53,333 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:50:53,333 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:50:53,333 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:50:53,333 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:50:53,333 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:50:53,334 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:50:53,334 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:50:53,334 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:50:53,334 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:50:53,338 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:50:53,338 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:50:53,389 INFO ]: Repository-Root is: /tmp [2018-06-22 02:50:53,405 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:50:53,408 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:50:53,410 INFO ]: Initializing SmtParser... [2018-06-22 02:50:53,411 INFO ]: SmtParser initialized [2018-06-22 02:50:53,411 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 [2018-06-22 02:50:53,413 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 02:50:53,507 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 unknown [2018-06-22 02:50:53,673 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/inc_cas_prop1.smt2 [2018-06-22 02:50:53,677 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:50:53,684 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:50:53,685 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:50:53,685 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:50:53,685 INFO ]: ChcToBoogie initialized [2018-06-22 02:50:53,689 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,757 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53 Unit [2018-06-22 02:50:53,757 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:50:53,758 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:50:53,758 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:50:53,758 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:50:53,780 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,780 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,787 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,787 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,790 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,792 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,793 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (1/1) ... [2018-06-22 02:50:53,794 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:50:53,795 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:50:53,795 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:50:53,795 INFO ]: RCFGBuilder initialized [2018-06-22 02:50:53,796 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (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 02:50:53,811 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:50:53,811 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:50:53,811 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:50:53,811 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:50:53,811 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:50:53,811 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 02:50:54,094 INFO ]: Using library mode [2018-06-22 02:50:54,094 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:50:54 BoogieIcfgContainer [2018-06-22 02:50:54,094 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:50:54,096 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:50:54,096 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:50:54,099 INFO ]: TraceAbstraction initialized [2018-06-22 02:50:54,099 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:50:53" (1/3) ... [2018-06-22 02:50:54,100 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611e343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:50:54, skipping insertion in model container [2018-06-22 02:50:54,100 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:50:53" (2/3) ... [2018-06-22 02:50:54,100 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611e343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:50:54, skipping insertion in model container [2018-06-22 02:50:54,100 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:50:54" (3/3) ... [2018-06-22 02:50:54,102 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:50:54,111 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:50:54,124 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:50:54,172 INFO ]: Using default assertion order modulation [2018-06-22 02:50:54,172 INFO ]: Interprodecural is true [2018-06-22 02:50:54,172 INFO ]: Hoare is false [2018-06-22 02:50:54,172 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:50:54,172 INFO ]: Backedges is TWOTRACK [2018-06-22 02:50:54,173 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:50:54,173 INFO ]: Difference is false [2018-06-22 02:50:54,173 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:50:54,173 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:50:54,186 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 02:50:54,196 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:50:54,196 INFO ]: Found error trace [2018-06-22 02:50:54,198 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:50:54,198 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:50:54,204 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 02:50:54,205 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:50:54,205 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:50:54,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:54,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:50:54,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:54,306 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:54,417 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:54,419 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:50:54,419 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:50:54,420 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:50:54,434 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:50:54,435 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:50:54,439 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 02:50:54,491 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:50:54,491 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 02:50:54,492 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:50:54,493 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:50:54,493 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:50:54,500 INFO ]: With dead ends: 9 [2018-06-22 02:50:54,500 INFO ]: Without dead ends: 9 [2018-06-22 02:50:54,502 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 02:50:54,515 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:50:54,542 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:50:54,544 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:50:54,544 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 02:50:54,545 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 02:50:54,545 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:50:54,546 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 02:50:54,546 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:50:54,546 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 02:50:54,546 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:50:54,546 INFO ]: Found error trace [2018-06-22 02:50:54,546 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:50:54,546 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:50:54,546 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 02:50:54,546 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:50:54,546 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:50:54,547 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:54,547 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:50:54,547 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:54,578 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:54,944 WARN ]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 02:50:54,946 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:54,946 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:50:54,946 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 02:50:54,958 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:50:55,019 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:55,028 INFO ]: Computing forward predicates... [2018-06-22 02:50:56,073 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2018-06-22 02:50:56,080 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:56,117 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:50:56,119 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 02:50:56,120 INFO ]: Interpolant automaton has 5 states [2018-06-22 02:50:56,120 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 02:50:56,120 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:50:56,120 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 02:50:56,195 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:50:56,195 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 02:50:56,196 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 02:50:56,196 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 02:50:56,196 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:50:56,196 INFO ]: With dead ends: 10 [2018-06-22 02:50:56,196 INFO ]: Without dead ends: 10 [2018-06-22 02:50:56,197 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:50:56,197 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 02:50:56,198 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 02:50:56,198 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 02:50:56,199 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 02:50:56,199 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 02:50:56,199 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:50:56,199 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 02:50:56,199 INFO ]: Interpolant automaton has 5 states. [2018-06-22 02:50:56,199 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 02:50:56,199 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 02:50:56,199 INFO ]: Found error trace [2018-06-22 02:50:56,199 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:50:56,200 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:50:56,200 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 02:50:56,200 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:50:56,200 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:50:56,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:56,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:50:56,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:56,248 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:56,568 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-06-22 02:50:56,696 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:56,696 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:50:56,696 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 02:50:56,706 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:50:56,753 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:50:56,753 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:56,756 INFO ]: Computing forward predicates... [2018-06-22 02:50:57,482 WARN ]: Spent 506.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2018-06-22 02:50:58,793 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2018-06-22 02:50:58,797 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:58,820 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:50:58,820 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 02:50:58,820 INFO ]: Interpolant automaton has 7 states [2018-06-22 02:50:58,820 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 02:50:58,820 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 02:50:58,821 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 02:50:58,862 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:50:58,862 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 02:50:58,862 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 02:50:58,863 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 02:50:58,863 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:50:58,863 INFO ]: With dead ends: 11 [2018-06-22 02:50:58,863 INFO ]: Without dead ends: 11 [2018-06-22 02:50:58,863 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 02:50:58,863 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 02:50:58,864 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 02:50:58,865 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:50:58,865 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 02:50:58,865 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 02:50:58,865 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:50:58,865 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 02:50:58,865 INFO ]: Interpolant automaton has 7 states. [2018-06-22 02:50:58,865 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 02:50:58,865 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:50:58,865 INFO ]: Found error trace [2018-06-22 02:50:58,866 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:50:58,866 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:50:58,866 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 02:50:58,866 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:50:58,866 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:50:58,867 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:58,867 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:50:58,867 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:50:58,904 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:59,366 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:50:59,366 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:50:59,366 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 [2018-06-22 02:50:59,381 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:50:59,425 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 02:50:59,425 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:50:59,430 INFO ]: Computing forward predicates... [2018-06-22 02:50:59,982 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-06-22 02:51:00,790 WARN ]: Spent 534.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 48 [2018-06-22 02:51:06,692 WARN ]: Spent 4.11 s on a formula simplification. DAG size of input: 217 DAG size of output: 39 [2018-06-22 02:51:06,711 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:51:06,734 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:51:06,734 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 02:51:06,734 INFO ]: Interpolant automaton has 10 states [2018-06-22 02:51:06,734 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 02:51:06,735 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:51:06,735 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 02:51:07,113 WARN ]: Spent 342.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-06-22 02:51:07,246 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-06-22 02:51:07,878 WARN ]: Spent 515.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2018-06-22 02:51:07,884 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:51:07,884 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-22 02:51:07,884 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 02:51:07,885 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 02:51:07,885 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:51:07,885 INFO ]: With dead ends: 7 [2018-06-22 02:51:07,885 INFO ]: Without dead ends: 0 [2018-06-22 02:51:07,885 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-06-22 02:51:07,885 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 02:51:07,885 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 02:51:07,885 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 02:51:07,885 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 02:51:07,886 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-06-22 02:51:07,886 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:51:07,886 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 02:51:07,886 INFO ]: Interpolant automaton has 10 states. [2018-06-22 02:51:07,886 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 02:51:07,886 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 02:51:07,891 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:51:07 BoogieIcfgContainer [2018-06-22 02:51:07,891 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:51:07,891 INFO ]: Toolchain (without parser) took 14213.37 ms. Allocated memory was 298.3 MB in the beginning and 475.0 MB in the end (delta: 176.7 MB). Free memory was 252.7 MB in the beginning and 216.5 MB in the end (delta: 36.3 MB). Peak memory consumption was 212.9 MB. Max. memory is 3.6 GB. [2018-06-22 02:51:07,892 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 298.3 MB. Free memory is still 262.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:51:07,893 INFO ]: ChcToBoogie took 72.80 ms. Allocated memory is still 298.3 MB. Free memory was 252.7 MB in the beginning and 250.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:51:07,893 INFO ]: Boogie Preprocessor took 36.63 ms. Allocated memory is still 298.3 MB. Free memory is still 250.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:51:07,893 INFO ]: RCFGBuilder took 299.64 ms. Allocated memory is still 298.3 MB. Free memory was 250.7 MB in the beginning and 240.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:51:07,894 INFO ]: TraceAbstraction took 13794.90 ms. Allocated memory was 298.3 MB in the beginning and 475.0 MB in the end (delta: 176.7 MB). Free memory was 240.7 MB in the beginning and 216.5 MB in the end (delta: 24.3 MB). Peak memory consumption was 201.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:51:07,897 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 298.3 MB. Free memory is still 262.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 72.80 ms. Allocated memory is still 298.3 MB. Free memory was 252.7 MB in the beginning and 250.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.63 ms. Allocated memory is still 298.3 MB. Free memory is still 250.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 299.64 ms. Allocated memory is still 298.3 MB. Free memory was 250.7 MB in the beginning and 240.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 13794.90 ms. Allocated memory was 298.3 MB in the beginning and 475.0 MB in the end (delta: 176.7 MB). Free memory was 240.7 MB in the beginning and 216.5 MB in the end (delta: 24.3 MB). Peak memory consumption was 201.0 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, 10 locations, 1 error locations. SAFE Result, 13.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 54 SDs, 0 SdLazy, 57 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 7714 SizeOfPredicates, 18 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 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/inc_cas_prop1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-51-07-907.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inc_cas_prop1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-51-07-907.csv Received shutdown request...