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/bk-nat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:10:56,068 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:10:56,070 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:10:56,082 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:10:56,082 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:10:56,083 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:10:56,084 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:10:56,089 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:10:56,090 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:10:56,092 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:10:56,093 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:10:56,093 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:10:56,094 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:10:56,096 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:10:56,096 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:10:56,097 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:10:56,101 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:10:56,103 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:10:56,111 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:10:56,112 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:10:56,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:10:56,125 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:10:56,125 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:10:56,125 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:10:56,126 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:10:56,127 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:10:56,128 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:10:56,128 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:10:56,129 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:10:56,130 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:10:56,130 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:10:56,131 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:10:56,131 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:10:56,132 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:10:56,133 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:10:56,133 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:10:56,149 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:10:56,150 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:10:56,150 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:10:56,150 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:10:56,151 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:10:56,152 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:10:56,152 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:10:56,152 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:10:56,152 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:10:56,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:10:56,153 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:10:56,153 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:10:56,153 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:10:56,153 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:10:56,153 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:10:56,154 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:10:56,154 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:10:56,155 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:10:56,155 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:10:56,201 INFO ]: Repository-Root is: /tmp [2018-06-22 05:10:56,214 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:10:56,220 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:10:56,221 INFO ]: Initializing SmtParser... [2018-06-22 05:10:56,221 INFO ]: SmtParser initialized [2018-06-22 05:10:56,222 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-22 05:10:56,224 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 05:10:56,324 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 unknown [2018-06-22 05:10:56,607 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-22 05:10:56,612 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:10:56,622 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:10:56,623 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:10:56,623 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:10:56,623 INFO ]: ChcToBoogie initialized [2018-06-22 05:10:56,629 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,693 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56 Unit [2018-06-22 05:10:56,693 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:10:56,693 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:10:56,693 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:10:56,694 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:10:56,715 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,715 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,731 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,732 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,746 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,747 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,749 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (1/1) ... [2018-06-22 05:10:56,752 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:10:56,752 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:10:56,752 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:10:56,752 INFO ]: RCFGBuilder initialized [2018-06-22 05:10:56,755 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (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 05:10:56,781 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:10:56,781 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:10:56,781 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:10:56,781 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:10:56,782 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:10:56,782 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:10:57,100 INFO ]: Using library mode [2018-06-22 05:10:57,101 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:10:57 BoogieIcfgContainer [2018-06-22 05:10:57,101 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:10:57,105 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:10:57,105 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:10:57,109 INFO ]: TraceAbstraction initialized [2018-06-22 05:10:57,109 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:10:56" (1/3) ... [2018-06-22 05:10:57,110 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c39182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:10:57, skipping insertion in model container [2018-06-22 05:10:57,110 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:10:56" (2/3) ... [2018-06-22 05:10:57,110 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c39182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:10:57, skipping insertion in model container [2018-06-22 05:10:57,110 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:10:57" (3/3) ... [2018-06-22 05:10:57,112 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:10:57,123 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:10:57,131 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:10:57,187 INFO ]: Using default assertion order modulation [2018-06-22 05:10:57,188 INFO ]: Interprodecural is true [2018-06-22 05:10:57,188 INFO ]: Hoare is false [2018-06-22 05:10:57,188 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:10:57,188 INFO ]: Backedges is TWOTRACK [2018-06-22 05:10:57,188 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:10:57,188 INFO ]: Difference is false [2018-06-22 05:10:57,188 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:10:57,188 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:10:57,209 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:10:57,224 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:10:57,226 INFO ]: Found error trace [2018-06-22 05:10:57,227 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:10:57,227 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:10:57,233 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:10:57,236 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:10:57,236 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:10:57,273 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:10:57,273 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:10:57,273 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:10:57,329 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:10:57,419 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:10:57,423 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:10:57,423 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:10:57,425 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:10:57,442 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:10:57,443 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:10:57,446 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:10:57,530 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:10:57,530 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:10:57,533 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:10:57,535 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:10:57,535 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:10:57,547 INFO ]: With dead ends: 9 [2018-06-22 05:10:57,547 INFO ]: Without dead ends: 9 [2018-06-22 05:10:57,550 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 05:10:57,564 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:10:57,579 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:10:57,580 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:10:57,581 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:10:57,582 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:10:57,582 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:10:57,582 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:10:57,582 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:10:57,582 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:10:57,583 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:10:57,583 INFO ]: Found error trace [2018-06-22 05:10:57,583 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:10:57,583 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:10:57,583 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:10:57,583 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:10:57,583 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:10:57,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:10:57,585 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:10:57,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:10:57,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:10:57,848 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:10:57,849 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:10:57,849 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 05:10:57,856 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:10:57,931 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:10:57,939 INFO ]: Computing forward predicates... [2018-06-22 05:10:58,351 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 1 [2018-06-22 05:11:01,984 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:11:02,006 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:11:02,006 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:11:02,006 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:11:02,006 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:11:02,006 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:11:02,007 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:11:02,222 WARN ]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 05:11:02,311 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:11:02,312 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:11:02,312 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:11:02,312 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:11:02,312 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:11:02,313 INFO ]: With dead ends: 10 [2018-06-22 05:11:02,313 INFO ]: Without dead ends: 10 [2018-06-22 05:11:02,314 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:11:02,314 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:11:02,315 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:11:02,315 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:11:02,315 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:11:02,315 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:11:02,315 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:11:02,315 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:11:02,315 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:11:02,315 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:11:02,316 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:11:02,316 INFO ]: Found error trace [2018-06-22 05:11:02,316 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:11:02,317 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:11:02,317 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:11:02,317 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:11:02,317 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:11:02,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:11:02,318 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:11:02,318 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:11:02,388 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:11:02,529 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:11:02,529 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:11:02,529 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 05:11:02,540 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:11:02,617 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:11:02,617 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:11:02,622 INFO ]: Computing forward predicates... [2018-06-22 05:11:05,486 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:11:05,523 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:11:05,523 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:11:05,523 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:11:05,524 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:11:05,524 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:11:05,524 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:11:05,733 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:11:05,733 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:11:05,734 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:11:05,734 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:11:05,734 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:11:05,734 INFO ]: With dead ends: 11 [2018-06-22 05:11:05,735 INFO ]: Without dead ends: 11 [2018-06-22 05:11:05,735 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:11:05,735 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:11:05,736 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:11:05,736 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:11:05,736 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:11:05,736 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:11:05,737 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:11:05,737 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:11:05,737 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:11:05,737 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:11:05,737 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:11:05,737 INFO ]: Found error trace [2018-06-22 05:11:05,737 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:11:05,737 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:11:05,737 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:11:05,737 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:11:05,737 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:11:05,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:11:05,738 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:11:05,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:11:05,842 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:11:06,590 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2018-06-22 05:11:06,618 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:11:06,618 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:11:06,618 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 05:11:06,633 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:11:06,726 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:11:06,726 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:11:06,730 INFO ]: Computing forward predicates... [2018-06-22 05:11:22,042 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,076 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,189 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,241 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,341 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,370 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:11:22,420 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:12:04,677 INFO ]: Timeout while computing interpolants [2018-06-22 05:12:04,878 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:04,878 WARN ]: Verification canceled [2018-06-22 05:12:04,883 WARN ]: Timeout [2018-06-22 05:12:04,884 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:12:04 BoogieIcfgContainer [2018-06-22 05:12:04,884 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:12:04,885 INFO ]: Toolchain (without parser) took 68272.38 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 256.3 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:12:04,886 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 309.9 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:12:04,886 INFO ]: ChcToBoogie took 70.59 ms. Allocated memory is still 309.9 MB. Free memory was 256.3 MB in the beginning and 252.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:12:04,887 INFO ]: Boogie Preprocessor took 58.20 ms. Allocated memory is still 309.9 MB. Free memory is still 252.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:12:04,887 INFO ]: RCFGBuilder took 348.68 ms. Allocated memory is still 309.9 MB. Free memory was 252.3 MB in the beginning and 236.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:12:04,887 INFO ]: TraceAbstraction took 67778.71 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.3 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:12:04,891 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 309.9 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.59 ms. Allocated memory is still 309.9 MB. Free memory was 256.3 MB in the beginning and 252.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.20 ms. Allocated memory is still 309.9 MB. Free memory is still 252.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 348.68 ms. Allocated memory is still 309.9 MB. Free memory was 252.3 MB in the beginning and 236.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67778.71 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.3 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 12249 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 67.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 34 SDs, 0 SdLazy, 17 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 678 SizeOfPredicates, 12 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-12-04-902.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-12-04-902.csv Completed graceful shutdown