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/vmt-chc-benchmarks/ctigar/lifo.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:31:55,585 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:31:55,586 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:31:55,598 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:31:55,598 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:31:55,600 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:31:55,601 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:31:55,607 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:31:55,610 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:31:55,610 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:31:55,611 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:31:55,612 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:31:55,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:31:55,614 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:31:55,615 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:31:55,616 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:31:55,618 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:31:55,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:31:55,621 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:31:55,622 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:31:55,624 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:31:55,626 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:31:55,626 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:31:55,627 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:31:55,627 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:31:55,628 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:31:55,629 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:31:55,630 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:31:55,631 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:31:55,631 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:31:55,632 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:31:55,633 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:31:55,633 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:31:55,634 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:31:55,634 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:31:55,635 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:31:55,658 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:31:55,658 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:31:55,662 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:31:55,662 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:31:55,663 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:31:55,663 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:31:55,664 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:31:55,664 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:31:55,664 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:31:55,664 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:31:55,664 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:31:55,665 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:31:55,666 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:31:55,666 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:31:55,666 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:31:55,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:31:55,666 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:31:55,668 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:31:55,668 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:31:55,729 INFO ]: Repository-Root is: /tmp [2018-06-22 05:31:55,744 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:31:55,752 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:31:55,754 INFO ]: Initializing SmtParser... [2018-06-22 05:31:55,754 INFO ]: SmtParser initialized [2018-06-22 05:31:55,755 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-22 05:31:55,756 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 05:31:55,860 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 unknown [2018-06-22 05:31:56,412 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifo.c.smt2 [2018-06-22 05:31:56,420 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:31:56,427 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:31:56,427 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:31:56,427 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:31:56,427 INFO ]: ChcToBoogie initialized [2018-06-22 05:31:56,431 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,503 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56 Unit [2018-06-22 05:31:56,503 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:31:56,504 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:31:56,504 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:31:56,504 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:31:56,522 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,522 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,533 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,533 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,553 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,556 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,561 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (1/1) ... [2018-06-22 05:31:56,566 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:31:56,567 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:31:56,567 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:31:56,567 INFO ]: RCFGBuilder initialized [2018-06-22 05:31:56,568 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:31:56,583 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:31:56,583 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:31:56,583 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:31:56,584 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:31:56,584 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:31:56,584 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:31:57,014 INFO ]: Using library mode [2018-06-22 05:31:57,015 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:31:57 BoogieIcfgContainer [2018-06-22 05:31:57,015 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:31:57,019 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:31:57,019 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:31:57,025 INFO ]: TraceAbstraction initialized [2018-06-22 05:31:57,025 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:31:56" (1/3) ... [2018-06-22 05:31:57,027 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f253831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:31:57, skipping insertion in model container [2018-06-22 05:31:57,027 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:31:56" (2/3) ... [2018-06-22 05:31:57,027 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f253831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:31:57, skipping insertion in model container [2018-06-22 05:31:57,027 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:31:57" (3/3) ... [2018-06-22 05:31:57,030 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:31:57,042 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:31:57,054 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:31:57,118 INFO ]: Using default assertion order modulation [2018-06-22 05:31:57,118 INFO ]: Interprodecural is true [2018-06-22 05:31:57,118 INFO ]: Hoare is false [2018-06-22 05:31:57,119 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:31:57,119 INFO ]: Backedges is TWOTRACK [2018-06-22 05:31:57,119 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:31:57,119 INFO ]: Difference is false [2018-06-22 05:31:57,119 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:31:57,119 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:31:57,136 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:31:57,153 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:31:57,153 INFO ]: Found error trace [2018-06-22 05:31:57,154 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:31:57,154 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:31:57,160 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:31:57,162 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:31:57,163 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:31:57,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:57,216 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:31:57,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:57,287 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:31:57,476 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:31:57,478 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:31:57,478 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:31:57,481 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:31:57,497 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:31:57,498 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:31:57,501 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:31:57,607 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:31:57,607 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:31:57,608 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:31:57,609 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:31:57,609 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:31:57,616 INFO ]: With dead ends: 9 [2018-06-22 05:31:57,616 INFO ]: Without dead ends: 9 [2018-06-22 05:31:57,618 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 [2018-06-22 05:31:57,631 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:31:57,661 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:31:57,663 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:31:57,663 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:31:57,665 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:31:57,665 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:31:57,665 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:31:57,665 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:31:57,665 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:31:57,665 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:31:57,665 INFO ]: Found error trace [2018-06-22 05:31:57,665 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:31:57,665 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:31:57,666 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:31:57,666 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:31:57,666 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:31:57,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:57,668 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:31:57,668 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:57,834 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:31:58,031 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:31:58,032 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:31:58,032 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 05:31:58,040 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:31:58,142 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:31:58,153 INFO ]: Computing forward predicates... [2018-06-22 05:31:59,246 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:31:59,269 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:31:59,269 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:31:59,270 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:31:59,270 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:31:59,270 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:31:59,270 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:31:59,457 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:31:59,457 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:31:59,458 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:31:59,458 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:31:59,459 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:31:59,459 INFO ]: With dead ends: 11 [2018-06-22 05:31:59,459 INFO ]: Without dead ends: 11 [2018-06-22 05:31:59,460 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:31:59,460 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:31:59,461 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:31:59,461 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:31:59,461 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:31:59,462 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:31:59,462 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:31:59,462 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:31:59,462 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:31:59,462 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:31:59,462 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:31:59,462 INFO ]: Found error trace [2018-06-22 05:31:59,462 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:31:59,462 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:31:59,462 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 05:31:59,462 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:31:59,462 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:31:59,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:59,465 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:31:59,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:31:59,669 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:32:00,141 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 05:32:00,202 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:32:00,202 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:32:00,202 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 05:32:00,208 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:32:00,382 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:32:00,382 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:32:00,388 INFO ]: Computing forward predicates... [2018-06-22 05:32:00,979 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-06-22 05:32:05,777 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:32:05,791 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:32:05,867 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown