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/lustre/PRODUCER_CONSUMER_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:33:21,915 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:33:21,919 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:33:21,932 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:33:21,933 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:33:21,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:33:21,935 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:33:21,938 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:33:21,940 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:33:21,941 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:33:21,941 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:33:21,941 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:33:21,944 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:33:21,945 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:33:21,945 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:33:21,946 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:33:21,950 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:33:21,951 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:33:21,952 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:33:21,962 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:33:21,963 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:33:21,965 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:33:21,965 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:33:21,965 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:33:21,967 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:33:21,968 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:33:21,969 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:33:21,970 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:33:21,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:33:21,971 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:33:21,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:33:21,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:33:21,975 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:33:21,977 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:33:21,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:33:21,977 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:33:21,998 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:33:21,998 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:33:21,999 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:33:21,999 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:33:22,000 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:33:22,000 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:33:22,000 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:33:22,001 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:33:22,001 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:33:22,001 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:33:22,001 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:33:22,001 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:33:22,002 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:33:22,002 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:33:22,002 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:33:22,002 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:33:22,002 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:33:22,004 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:33:22,004 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:33:22,059 INFO ]: Repository-Root is: /tmp [2018-06-22 09:33:22,072 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:33:22,076 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:33:22,077 INFO ]: Initializing SmtParser... [2018-06-22 09:33:22,077 INFO ]: SmtParser initialized [2018-06-22 09:33:22,078 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_1.smt2 [2018-06-22 09:33:22,079 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 09:33:22,168 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_1.smt2 unknown [2018-06-22 09:33:22,554 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_1.smt2 [2018-06-22 09:33:22,559 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:33:22,566 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:33:22,566 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:33:22,566 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:33:22,567 INFO ]: ChcToBoogie initialized [2018-06-22 09:33:22,570 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,637 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22 Unit [2018-06-22 09:33:22,638 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:33:22,638 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:33:22,638 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:33:22,638 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:33:22,658 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,658 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,666 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,666 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,675 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,677 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,679 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... [2018-06-22 09:33:22,681 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:33:22,683 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:33:22,684 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:33:22,684 INFO ]: RCFGBuilder initialized [2018-06-22 09:33:22,684 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 09:33:22,693 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:33:22,694 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:33:22,694 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:33:22,694 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:33:22,694 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:33:22,694 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:33:23,011 INFO ]: Using library mode [2018-06-22 09:33:23,018 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:33:23 BoogieIcfgContainer [2018-06-22 09:33:23,018 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:33:23,019 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:33:23,019 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:33:23,022 INFO ]: TraceAbstraction initialized [2018-06-22 09:33:23,022 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:33:22" (1/3) ... [2018-06-22 09:33:23,023 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55805b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:33:23, skipping insertion in model container [2018-06-22 09:33:23,023 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:22" (2/3) ... [2018-06-22 09:33:23,023 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55805b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:33:23, skipping insertion in model container [2018-06-22 09:33:23,023 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:33:23" (3/3) ... [2018-06-22 09:33:23,027 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:33:23,036 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:33:23,044 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:33:23,081 INFO ]: Using default assertion order modulation [2018-06-22 09:33:23,082 INFO ]: Interprodecural is true [2018-06-22 09:33:23,082 INFO ]: Hoare is false [2018-06-22 09:33:23,082 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:33:23,082 INFO ]: Backedges is TWOTRACK [2018-06-22 09:33:23,082 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:33:23,082 INFO ]: Difference is false [2018-06-22 09:33:23,082 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:33:23,082 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:33:23,096 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:33:23,112 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:33:23,112 INFO ]: Found error trace [2018-06-22 09:33:23,113 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:23,113 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:23,119 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 09:33:23,122 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:23,122 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:23,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:23,156 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:23,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:23,231 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:23,366 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:23,368 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:33:23,368 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:33:23,369 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:33:23,381 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:33:23,381 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:33:23,385 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:33:23,456 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:23,458 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:33:23,458 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:33:23,459 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:33:23,460 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:23,469 INFO ]: With dead ends: 9 [2018-06-22 09:33:23,469 INFO ]: Without dead ends: 9 [2018-06-22 09:33:23,473 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 09:33:23,491 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:33:23,521 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:33:23,522 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:33:23,522 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:33:23,524 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:33:23,524 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:23,524 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:33:23,524 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:33:23,524 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:33:23,525 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:33:23,525 INFO ]: Found error trace [2018-06-22 09:33:23,525 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:23,525 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:23,525 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 09:33:23,525 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:23,525 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:23,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:23,526 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:23,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:23,623 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:23,913 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:23,913 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:33:23,913 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 09:33:23,922 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:24,065 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:24,076 INFO ]: Computing forward predicates... [2018-06-22 09:33:24,575 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-06-22 09:33:24,590 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:24,610 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:33:24,610 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 09:33:24,611 INFO ]: Interpolant automaton has 5 states [2018-06-22 09:33:24,611 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 09:33:24,611 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 09:33:24,611 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 09:33:24,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:24,785 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 09:33:24,786 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 09:33:24,786 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 09:33:24,786 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:24,787 INFO ]: With dead ends: 10 [2018-06-22 09:33:24,787 INFO ]: Without dead ends: 10 [2018-06-22 09:33:24,788 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 09:33:24,788 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 09:33:24,789 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 09:33:24,789 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 09:33:24,789 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 09:33:24,789 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 09:33:24,789 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:24,789 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 09:33:24,789 INFO ]: Interpolant automaton has 5 states. [2018-06-22 09:33:24,789 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 09:33:24,792 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 09:33:24,792 INFO ]: Found error trace [2018-06-22 09:33:24,792 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:24,792 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:24,792 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 09:33:24,792 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:24,793 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:24,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:24,793 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:24,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:24,897 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:25,426 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-06-22 09:33:25,443 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:25,443 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:33:25,443 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 09:33:25,450 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:33:25,572 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:33:25,572 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:25,578 INFO ]: Computing forward predicates... [2018-06-22 09:33:26,008 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:26,040 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:33:26,040 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 09:33:26,040 INFO ]: Interpolant automaton has 7 states [2018-06-22 09:33:26,040 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 09:33:26,041 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 09:33:26,041 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 09:33:26,302 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 09:33:26,344 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:26,344 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-22 09:33:26,346 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 09:33:26,346 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 09:33:26,346 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:26,346 INFO ]: With dead ends: 6 [2018-06-22 09:33:26,346 INFO ]: Without dead ends: 0 [2018-06-22 09:33:26,346 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 09:33:26,346 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 09:33:26,347 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 09:33:26,347 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 09:33:26,347 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 09:33:26,347 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-22 09:33:26,347 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:26,347 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 09:33:26,347 INFO ]: Interpolant automaton has 7 states. [2018-06-22 09:33:26,347 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 09:33:26,347 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 09:33:26,354 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 09:33:26 BoogieIcfgContainer [2018-06-22 09:33:26,354 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 09:33:26,355 INFO ]: Toolchain (without parser) took 3795.33 ms. Allocated memory was 301.5 MB in the beginning and 331.4 MB in the end (delta: 29.9 MB). Free memory was 250.6 MB in the beginning and 229.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 50.8 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:26,355 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 301.5 MB. Free memory is still 266.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 09:33:26,360 INFO ]: ChcToBoogie took 71.62 ms. Allocated memory is still 301.5 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:26,361 INFO ]: Boogie Preprocessor took 43.15 ms. Allocated memory is still 301.5 MB. Free memory was 246.6 MB in the beginning and 244.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:26,361 INFO ]: RCFGBuilder took 334.38 ms. Allocated memory is still 301.5 MB. Free memory was 244.6 MB in the beginning and 227.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:26,362 INFO ]: TraceAbstraction took 3334.81 ms. Allocated memory was 301.5 MB in the beginning and 331.4 MB in the end (delta: 29.9 MB). Free memory was 225.0 MB in the beginning and 229.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 25.3 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:26,367 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 301.5 MB. Free memory is still 266.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 71.62 ms. Allocated memory is still 301.5 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.15 ms. Allocated memory is still 301.5 MB. Free memory was 246.6 MB in the beginning and 244.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 334.38 ms. Allocated memory is still 301.5 MB. Free memory was 244.6 MB in the beginning and 227.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3334.81 ms. Allocated memory was 301.5 MB in the beginning and 331.4 MB in the end (delta: 29.9 MB). Free memory was 225.0 MB in the beginning and 229.6 MB in the end (delta: -4.6 MB). Peak memory consumption was 25.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 30 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 706 SizeOfPredicates, 6 NumberOfNonLiveVariables, 932 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/PRODUCER_CONSUMER_1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_09-33-26-382.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/PRODUCER_CONSUMER_1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_09-33-26-382.csv Received shutdown request...