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/eldarica-misc/LIA/reve/024b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:17:14,007 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:17:14,009 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:17:14,019 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:17:14,020 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:17:14,020 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:17:14,021 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:17:14,026 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:17:14,028 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:17:14,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:17:14,029 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:17:14,030 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:17:14,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:17:14,032 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:17:14,032 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:17:14,033 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:17:14,035 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:17:14,037 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:17:14,038 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:17:14,048 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:17:14,050 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:17:14,052 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:17:14,052 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:17:14,052 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:17:14,053 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:17:14,054 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:17:14,055 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:17:14,055 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:17:14,056 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:17:14,057 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:17:14,065 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:17:14,066 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:17:14,066 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:17:14,066 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:17:14,067 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:17:14,067 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:17:14,092 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:17:14,092 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:17:14,092 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:17:14,092 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:17:14,097 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:17:14,097 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:17:14,097 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:17:14,097 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:17:14,097 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:17:14,098 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:17:14,098 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:17:14,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:17:14,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:17:14,098 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:17:14,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:17:14,101 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:17:14,102 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:17:14,102 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:17:14,147 INFO ]: Repository-Root is: /tmp [2018-06-25 09:17:14,165 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:17:14,171 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:17:14,173 INFO ]: Initializing SmtParser... [2018-06-25 09:17:14,173 INFO ]: SmtParser initialized [2018-06-25 09:17:14,173 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-25 09:17:14,175 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 09:17:14,265 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 unknown [2018-06-25 09:17:14,464 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-25 09:17:14,469 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:17:14,478 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:17:14,478 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:17:14,478 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:17:14,479 INFO ]: ChcToBoogie initialized [2018-06-25 09:17:14,482 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,533 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14 Unit [2018-06-25 09:17:14,534 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:17:14,534 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:17:14,534 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:17:14,534 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:17:14,555 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,555 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,561 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,561 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,564 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,566 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,567 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (1/1) ... [2018-06-25 09:17:14,568 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:17:14,572 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:17:14,572 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:17:14,572 INFO ]: RCFGBuilder initialized [2018-06-25 09:17:14,573 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (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 09:17:14,584 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:17:14,584 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:17:14,584 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:17:14,584 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:17:14,584 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:17:14,584 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 09:17:14,839 INFO ]: Using library mode [2018-06-25 09:17:14,839 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:17:14 BoogieIcfgContainer [2018-06-25 09:17:14,839 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:17:14,840 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:17:14,840 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:17:14,843 INFO ]: TraceAbstraction initialized [2018-06-25 09:17:14,843 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:17:14" (1/3) ... [2018-06-25 09:17:14,845 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b354820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:17:14, skipping insertion in model container [2018-06-25 09:17:14,845 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:14" (2/3) ... [2018-06-25 09:17:14,845 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b354820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:17:14, skipping insertion in model container [2018-06-25 09:17:14,845 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:17:14" (3/3) ... [2018-06-25 09:17:14,847 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:17:14,855 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:17:14,861 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:17:14,896 INFO ]: Using default assertion order modulation [2018-06-25 09:17:14,896 INFO ]: Interprodecural is true [2018-06-25 09:17:14,896 INFO ]: Hoare is false [2018-06-25 09:17:14,896 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:17:14,896 INFO ]: Backedges is TWOTRACK [2018-06-25 09:17:14,896 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:17:14,896 INFO ]: Difference is false [2018-06-25 09:17:14,896 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:17:14,896 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:17:14,907 INFO ]: Start isEmpty. Operand 12 states. [2018-06-25 09:17:14,918 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:17:14,919 INFO ]: Found error trace [2018-06-25 09:17:14,919 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:14,920 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:14,925 INFO ]: Analyzing trace with hash 80507752, now seen corresponding path program 1 times [2018-06-25 09:17:14,927 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:14,927 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:14,974 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:14,975 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:14,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:15,014 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:15,225 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-06-25 09:17:15,227 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:15,230 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:17:15,230 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:17:15,232 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:17:15,242 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:17:15,243 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:17:15,244 INFO ]: Start difference. First operand 12 states. Second operand 3 states. [2018-06-25 09:17:15,327 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:15,327 INFO ]: Finished difference Result 15 states and 23 transitions. [2018-06-25 09:17:15,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:17:15,329 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 09:17:15,330 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:15,340 INFO ]: With dead ends: 15 [2018-06-25 09:17:15,340 INFO ]: Without dead ends: 15 [2018-06-25 09:17:15,342 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:17:15,360 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 09:17:15,379 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-06-25 09:17:15,380 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 09:17:15,381 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2018-06-25 09:17:15,382 INFO ]: Start accepts. Automaton has 11 states and 17 transitions. Word has length 7 [2018-06-25 09:17:15,382 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:15,382 INFO ]: Abstraction has 11 states and 17 transitions. [2018-06-25 09:17:15,382 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:17:15,382 INFO ]: Start isEmpty. Operand 11 states and 17 transitions. [2018-06-25 09:17:15,382 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 09:17:15,382 INFO ]: Found error trace [2018-06-25 09:17:15,382 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:15,383 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:15,383 INFO ]: Analyzing trace with hash -1808795508, now seen corresponding path program 1 times [2018-06-25 09:17:15,383 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:15,383 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:15,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:15,384 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:15,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:15,398 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:15,578 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-06-25 09:17:15,687 WARN ]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 09:17:15,689 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:15,689 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:15,689 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) [2018-06-25 09:17:15,704 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:15,734 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:15,739 INFO ]: Computing forward predicates... [2018-06-25 09:17:15,781 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:15,801 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:15,801 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 09:17:15,801 INFO ]: Interpolant automaton has 5 states [2018-06-25 09:17:15,801 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 09:17:15,801 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 09:17:15,802 INFO ]: Start difference. First operand 11 states and 17 transitions. Second operand 5 states. [2018-06-25 09:17:15,894 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:15,894 INFO ]: Finished difference Result 16 states and 24 transitions. [2018-06-25 09:17:15,894 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 09:17:15,894 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 09:17:15,894 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:15,895 INFO ]: With dead ends: 16 [2018-06-25 09:17:15,895 INFO ]: Without dead ends: 16 [2018-06-25 09:17:15,896 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 09:17:15,896 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 09:17:15,898 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-06-25 09:17:15,898 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 09:17:15,898 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2018-06-25 09:17:15,898 INFO ]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 8 [2018-06-25 09:17:15,898 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:15,898 INFO ]: Abstraction has 12 states and 18 transitions. [2018-06-25 09:17:15,898 INFO ]: Interpolant automaton has 5 states. [2018-06-25 09:17:15,898 INFO ]: Start isEmpty. Operand 12 states and 18 transitions. [2018-06-25 09:17:15,899 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 09:17:15,899 INFO ]: Found error trace [2018-06-25 09:17:15,899 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:15,899 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:15,899 INFO ]: Analyzing trace with hash -247654424, now seen corresponding path program 2 times [2018-06-25 09:17:15,899 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:15,899 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:15,900 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:15,900 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:15,900 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:15,922 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:16,068 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:16,068 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:16,068 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 09:17:16,077 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 09:17:16,107 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 09:17:16,107 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:16,110 INFO ]: Computing forward predicates... [2018-06-25 09:17:16,312 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:16,332 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:16,332 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-25 09:17:16,333 INFO ]: Interpolant automaton has 7 states [2018-06-25 09:17:16,333 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 09:17:16,333 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 09:17:16,333 INFO ]: Start difference. First operand 12 states and 18 transitions. Second operand 7 states. [2018-06-25 09:17:16,591 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:16,591 INFO ]: Finished difference Result 22 states and 34 transitions. [2018-06-25 09:17:16,592 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 09:17:16,592 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-25 09:17:16,592 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:16,592 INFO ]: With dead ends: 22 [2018-06-25 09:17:16,592 INFO ]: Without dead ends: 22 [2018-06-25 09:17:16,593 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 09:17:16,593 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-25 09:17:16,595 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-06-25 09:17:16,595 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 09:17:16,596 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 22 transitions. [2018-06-25 09:17:16,596 INFO ]: Start accepts. Automaton has 14 states and 22 transitions. Word has length 9 [2018-06-25 09:17:16,596 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:16,596 INFO ]: Abstraction has 14 states and 22 transitions. [2018-06-25 09:17:16,596 INFO ]: Interpolant automaton has 7 states. [2018-06-25 09:17:16,596 INFO ]: Start isEmpty. Operand 14 states and 22 transitions. [2018-06-25 09:17:16,609 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 09:17:16,609 INFO ]: Found error trace [2018-06-25 09:17:16,609 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:16,610 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:16,610 INFO ]: Analyzing trace with hash 906862381, now seen corresponding path program 1 times [2018-06-25 09:17:16,610 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:16,610 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:16,611 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:16,611 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:16,611 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:16,622 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:16,662 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-25 09:17:16,662 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:16,662 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 09:17:16,668 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:16,684 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:16,686 INFO ]: Computing forward predicates... [2018-06-25 09:17:16,693 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-25 09:17:16,715 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-25 09:17:16,715 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-06-25 09:17:16,715 INFO ]: Interpolant automaton has 4 states [2018-06-25 09:17:16,715 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 09:17:16,715 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:17:16,716 INFO ]: Start difference. First operand 14 states and 22 transitions. Second operand 4 states. [2018-06-25 09:17:16,743 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:16,743 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 09:17:16,744 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:17:16,744 INFO ]: Start accepts. Automaton has 4 states. Word has length 10 [2018-06-25 09:17:16,744 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:16,744 INFO ]: With dead ends: 12 [2018-06-25 09:17:16,744 INFO ]: Without dead ends: 12 [2018-06-25 09:17:16,745 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:17:16,745 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 09:17:16,746 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 09:17:16,746 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 09:17:16,746 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 09:17:16,746 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 09:17:16,746 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:16,746 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 09:17:16,746 INFO ]: Interpolant automaton has 4 states. [2018-06-25 09:17:16,746 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 09:17:16,747 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 09:17:16,747 INFO ]: Found error trace [2018-06-25 09:17:16,747 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:16,747 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:16,747 INFO ]: Analyzing trace with hash -2078892952, now seen corresponding path program 3 times [2018-06-25 09:17:16,747 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:16,747 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:16,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:16,749 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:16,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:16,780 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:17,150 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:17,150 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:17,150 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:17,165 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 09:17:17,235 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 09:17:17,235 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:17,238 INFO ]: Computing forward predicates... [2018-06-25 09:17:17,563 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:17,583 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:17,583 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-25 09:17:17,583 INFO ]: Interpolant automaton has 11 states [2018-06-25 09:17:17,583 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-25 09:17:17,584 INFO ]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-25 09:17:17,584 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-06-25 09:17:18,789 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:18,790 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 09:17:18,791 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 09:17:18,791 INFO ]: Start accepts. Automaton has 11 states. Word has length 11 [2018-06-25 09:17:18,791 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:18,791 INFO ]: With dead ends: 15 [2018-06-25 09:17:18,791 INFO ]: Without dead ends: 15 [2018-06-25 09:17:18,792 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-06-25 09:17:18,792 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 09:17:18,793 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 09:17:18,793 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 09:17:18,794 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 09:17:18,794 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-06-25 09:17:18,794 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:18,794 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 09:17:18,794 INFO ]: Interpolant automaton has 11 states. [2018-06-25 09:17:18,794 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 09:17:18,794 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 09:17:18,794 INFO ]: Found error trace [2018-06-25 09:17:18,794 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:18,794 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:18,794 INFO ]: Analyzing trace with hash 216865548, now seen corresponding path program 4 times [2018-06-25 09:17:18,794 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:18,794 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:18,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:18,795 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:18,795 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:18,853 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:19,083 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:19,083 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:19,083 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:19,091 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 09:17:19,122 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 09:17:19,122 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:19,127 INFO ]: Computing forward predicates... [2018-06-25 09:17:19,404 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:19,425 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:19,425 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-25 09:17:19,426 INFO ]: Interpolant automaton has 17 states [2018-06-25 09:17:19,426 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-25 09:17:19,426 INFO ]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-06-25 09:17:19,426 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2018-06-25 09:17:19,968 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:19,968 INFO ]: Finished difference Result 22 states and 22 transitions. [2018-06-25 09:17:19,968 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-25 09:17:19,968 INFO ]: Start accepts. Automaton has 17 states. Word has length 14 [2018-06-25 09:17:19,968 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:19,969 INFO ]: With dead ends: 22 [2018-06-25 09:17:19,969 INFO ]: Without dead ends: 22 [2018-06-25 09:17:19,969 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2018-06-25 09:17:19,970 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-25 09:17:19,972 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-06-25 09:17:19,972 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-25 09:17:19,972 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-06-25 09:17:19,972 INFO ]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2018-06-25 09:17:19,973 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:19,973 INFO ]: Abstraction has 22 states and 22 transitions. [2018-06-25 09:17:19,973 INFO ]: Interpolant automaton has 17 states. [2018-06-25 09:17:19,973 INFO ]: Start isEmpty. Operand 22 states and 22 transitions. [2018-06-25 09:17:19,973 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-25 09:17:19,973 INFO ]: Found error trace [2018-06-25 09:17:19,973 INFO ]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:19,973 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:19,973 INFO ]: Analyzing trace with hash 290673384, now seen corresponding path program 5 times [2018-06-25 09:17:19,973 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:19,973 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:19,974 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:19,974 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:19,974 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:20,019 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:20,258 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 09:17:20,699 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:20,699 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:20,699 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:20,717 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 09:17:20,836 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-25 09:17:20,836 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:20,853 INFO ]: Computing forward predicates... [2018-06-25 09:17:21,444 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:21,463 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:21,463 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-06-25 09:17:21,464 INFO ]: Interpolant automaton has 32 states [2018-06-25 09:17:21,464 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-25 09:17:21,464 INFO ]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2018-06-25 09:17:21,464 INFO ]: Start difference. First operand 22 states and 22 transitions. Second operand 32 states. [2018-06-25 09:17:23,065 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:23,065 INFO ]: Finished difference Result 23 states and 23 transitions. [2018-06-25 09:17:23,065 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-25 09:17:23,065 INFO ]: Start accepts. Automaton has 32 states. Word has length 21 [2018-06-25 09:17:23,066 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:23,066 INFO ]: With dead ends: 23 [2018-06-25 09:17:23,066 INFO ]: Without dead ends: 23 [2018-06-25 09:17:23,067 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-06-25 09:17:23,068 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-25 09:17:23,069 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-25 09:17:23,069 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-25 09:17:23,070 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-06-25 09:17:23,070 INFO ]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-06-25 09:17:23,070 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:23,070 INFO ]: Abstraction has 23 states and 23 transitions. [2018-06-25 09:17:23,070 INFO ]: Interpolant automaton has 32 states. [2018-06-25 09:17:23,070 INFO ]: Start isEmpty. Operand 23 states and 23 transitions. [2018-06-25 09:17:23,071 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-25 09:17:23,071 INFO ]: Found error trace [2018-06-25 09:17:23,071 INFO ]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:23,071 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:23,071 INFO ]: Analyzing trace with hash 411371788, now seen corresponding path program 6 times [2018-06-25 09:17:23,071 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:23,071 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:23,072 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:23,072 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:23,072 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:23,129 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:23,361 INFO ]: Checked inductivity of 120 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-25 09:17:23,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:23,361 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:23,367 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 09:17:23,414 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-25 09:17:23,414 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:23,421 INFO ]: Computing forward predicates... [2018-06-25 09:17:24,034 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:24,053 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:24,053 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18] total 21 [2018-06-25 09:17:24,054 INFO ]: Interpolant automaton has 21 states [2018-06-25 09:17:24,054 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-25 09:17:24,054 INFO ]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2018-06-25 09:17:24,054 INFO ]: Start difference. First operand 23 states and 23 transitions. Second operand 21 states. [2018-06-25 09:17:24,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:24,372 INFO ]: Finished difference Result 20 states and 20 transitions. [2018-06-25 09:17:24,372 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-25 09:17:24,372 INFO ]: Start accepts. Automaton has 21 states. Word has length 22 [2018-06-25 09:17:24,372 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:24,372 INFO ]: With dead ends: 20 [2018-06-25 09:17:24,372 INFO ]: Without dead ends: 0 [2018-06-25 09:17:24,373 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2018-06-25 09:17:24,373 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 09:17:24,373 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 09:17:24,373 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 09:17:24,373 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 09:17:24,373 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-06-25 09:17:24,373 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:24,373 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 09:17:24,373 INFO ]: Interpolant automaton has 21 states. [2018-06-25 09:17:24,373 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 09:17:24,373 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 09:17:24,379 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:17:24 BoogieIcfgContainer [2018-06-25 09:17:24,379 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:17:24,380 INFO ]: Toolchain (without parser) took 9910.59 ms. Allocated memory was 308.8 MB in the beginning and 404.8 MB in the end (delta: 95.9 MB). Free memory was 265.3 MB in the beginning and 354.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 3.6 GB. [2018-06-25 09:17:24,382 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:17:24,382 INFO ]: ChcToBoogie took 55.49 ms. Allocated memory is still 308.8 MB. Free memory was 264.3 MB in the beginning and 262.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:17:24,383 INFO ]: Boogie Preprocessor took 34.08 ms. Allocated memory is still 308.8 MB. Free memory was 262.3 MB in the beginning and 261.3 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-25 09:17:24,383 INFO ]: RCFGBuilder took 267.39 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 252.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. [2018-06-25 09:17:24,383 INFO ]: TraceAbstraction took 9538.58 ms. Allocated memory was 308.8 MB in the beginning and 404.8 MB in the end (delta: 95.9 MB). Free memory was 252.3 MB in the beginning and 354.6 MB in the end (delta: -102.3 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:17:24,386 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 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 55.49 ms. Allocated memory is still 308.8 MB. Free memory was 264.3 MB in the beginning and 262.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.08 ms. Allocated memory is still 308.8 MB. Free memory was 262.3 MB in the beginning and 261.3 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 267.39 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 252.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 9538.58 ms. Allocated memory was 308.8 MB in the beginning and 404.8 MB in the end (delta: 95.9 MB). Free memory was 252.3 MB in the beginning and 354.6 MB in the end (delta: -102.3 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. SAFE Result, 9.4s OverallTime, 8 OverallIterations, 15 TraceHistogramMax, 4.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 44 SDslu, 340 SDs, 0 SdLazy, 822 SolverSat, 46 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 56 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=7, 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, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 197 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 182 ConstructedInterpolants, 9 QuantifiedInterpolants, 28524 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1203 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 82/540 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/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_09-17-24-398.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_09-17-24-398.csv Received shutdown request...