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/vmt-chc-benchmarks/ctigar/apache-get-tag.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:45:16,938 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:45:16,940 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:45:16,951 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:45:16,952 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:45:16,953 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:45:16,954 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:45:16,956 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:45:16,958 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:45:16,959 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:45:16,959 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:45:16,960 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:45:16,960 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:45:16,962 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:45:16,962 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:45:16,966 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:45:16,968 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:45:16,972 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:45:16,973 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:45:16,974 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:45:16,975 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:45:16,978 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:45:16,978 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:45:16,978 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:45:16,979 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:45:16,980 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:45:16,981 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:45:16,982 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:45:16,983 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:45:16,983 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:45:16,983 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:45:16,984 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:45:16,984 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:45:16,985 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:45:16,986 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:45:16,986 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:45:17,000 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:45:17,001 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:45:17,001 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:45:17,001 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:45:17,002 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:45:17,003 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:45:17,003 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:45:17,003 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:45:17,003 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:45:17,003 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:45:17,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:45:17,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:45:17,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:45:17,004 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:45:17,004 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:45:17,005 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:45:17,007 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:45:17,007 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:45:17,048 INFO ]: Repository-Root is: /tmp [2018-06-25 12:45:17,066 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:45:17,071 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:45:17,073 INFO ]: Initializing SmtParser... [2018-06-25 12:45:17,073 INFO ]: SmtParser initialized [2018-06-25 12:45:17,074 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-get-tag.c.smt2 [2018-06-25 12:45:17,075 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 12:45:17,168 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-get-tag.c.smt2 unknown [2018-06-25 12:45:17,594 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/apache-get-tag.c.smt2 [2018-06-25 12:45:17,599 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:45:17,608 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:45:17,608 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:45:17,609 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:45:17,611 INFO ]: ChcToBoogie initialized [2018-06-25 12:45:17,614 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,682 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17 Unit [2018-06-25 12:45:17,682 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:45:17,683 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:45:17,683 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:45:17,683 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:45:17,697 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,697 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,705 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,705 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,716 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,717 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,720 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (1/1) ... [2018-06-25 12:45:17,723 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:45:17,724 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:45:17,724 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:45:17,724 INFO ]: RCFGBuilder initialized [2018-06-25 12:45:17,725 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (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 [2018-06-25 12:45:17,746 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:45:17,747 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:45:17,747 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:45:17,747 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:45:17,747 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:45:17,747 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 12:45:18,040 INFO ]: Using library mode [2018-06-25 12:45:18,041 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:45:18 BoogieIcfgContainer [2018-06-25 12:45:18,041 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:45:18,046 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:45:18,046 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:45:18,049 INFO ]: TraceAbstraction initialized [2018-06-25 12:45:18,049 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:45:17" (1/3) ... [2018-06-25 12:45:18,054 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220ff9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:45:18, skipping insertion in model container [2018-06-25 12:45:18,054 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:45:17" (2/3) ... [2018-06-25 12:45:18,054 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220ff9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:45:18, skipping insertion in model container [2018-06-25 12:45:18,054 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:45:18" (3/3) ... [2018-06-25 12:45:18,056 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:45:18,067 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:45:18,076 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:45:18,134 INFO ]: Using default assertion order modulation [2018-06-25 12:45:18,135 INFO ]: Interprodecural is true [2018-06-25 12:45:18,135 INFO ]: Hoare is false [2018-06-25 12:45:18,135 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:45:18,135 INFO ]: Backedges is TWOTRACK [2018-06-25 12:45:18,135 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:45:18,135 INFO ]: Difference is false [2018-06-25 12:45:18,135 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:45:18,135 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:45:18,152 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:45:18,164 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:45:18,164 INFO ]: Found error trace [2018-06-25 12:45:18,165 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:45:18,165 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:45:18,172 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 12:45:18,174 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:45:18,174 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:45:18,209 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:18,209 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:45:18,209 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:18,266 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:18,499 WARN ]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 12:45:18,501 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:18,504 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:45:18,504 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:45:18,506 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:45:18,522 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:45:18,523 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:45:18,525 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:45:18,601 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:45:18,603 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:45:18,603 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:45:18,604 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:45:18,605 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:45:18,616 INFO ]: With dead ends: 9 [2018-06-25 12:45:18,616 INFO ]: Without dead ends: 9 [2018-06-25 12:45:18,618 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 [2018-06-25 12:45:18,634 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:45:18,650 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:45:18,655 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:45:18,655 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:45:18,657 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:45:18,657 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:45:18,657 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:45:18,657 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:45:18,657 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:45:18,657 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:45:18,657 INFO ]: Found error trace [2018-06-25 12:45:18,657 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:45:18,658 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:45:18,658 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 12:45:18,658 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:45:18,658 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:45:18,659 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:18,659 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:45:18,659 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:18,745 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:18,962 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-25 12:45:19,028 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:19,028 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:45:19,028 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 [2018-06-25 12:45:19,038 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:45:19,157 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:19,167 INFO ]: Computing forward predicates... [2018-06-25 12:45:20,119 WARN ]: Spent 467.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-06-25 12:45:20,589 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:20,611 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:45:20,611 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 12:45:20,612 INFO ]: Interpolant automaton has 5 states [2018-06-25 12:45:20,612 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 12:45:20,612 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:45:20,612 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 12:45:20,941 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-06-25 12:45:20,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:45:20,955 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 12:45:20,955 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:45:20,955 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 12:45:20,955 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:45:20,955 INFO ]: With dead ends: 10 [2018-06-25 12:45:20,955 INFO ]: Without dead ends: 10 [2018-06-25 12:45:20,956 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:45:20,956 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 12:45:20,958 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 12:45:20,958 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 12:45:20,959 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 12:45:20,959 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 12:45:20,959 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:45:20,959 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 12:45:20,959 INFO ]: Interpolant automaton has 5 states. [2018-06-25 12:45:20,959 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 12:45:20,959 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 12:45:20,959 INFO ]: Found error trace [2018-06-25 12:45:20,959 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:45:20,960 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:45:20,960 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-25 12:45:20,960 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:45:20,960 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:45:20,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:20,961 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:45:20,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:21,024 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:21,611 WARN ]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-25 12:45:21,630 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:21,630 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:45:21,630 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) [2018-06-25 12:45:21,644 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:45:21,728 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:45:21,728 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:21,732 INFO ]: Computing forward predicates... [2018-06-25 12:45:22,040 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2018-06-25 12:45:42,461 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:42,482 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:45:42,482 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 12:45:42,482 INFO ]: Interpolant automaton has 6 states [2018-06-25 12:45:42,482 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 12:45:42,482 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:45:42,483 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 12:45:42,661 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:45:42,661 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 12:45:42,662 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 12:45:42,662 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 12:45:42,662 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:45:42,663 INFO ]: With dead ends: 11 [2018-06-25 12:45:42,663 INFO ]: Without dead ends: 11 [2018-06-25 12:45:42,663 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 12:45:42,663 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 12:45:42,664 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 12:45:42,664 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 12:45:42,665 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 12:45:42,665 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 12:45:42,665 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:45:42,665 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 12:45:42,665 INFO ]: Interpolant automaton has 6 states. [2018-06-25 12:45:42,665 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 12:45:42,665 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 12:45:42,665 INFO ]: Found error trace [2018-06-25 12:45:42,665 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:45:42,665 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:45:42,666 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-25 12:45:42,666 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:45:42,666 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:45:42,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:42,666 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:45:42,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:45:42,757 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:43,067 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 12:45:43,127 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:45:43,127 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:45:43,127 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 12:45:43,210 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:45:43,292 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:45:43,310 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:45:43,314 INFO ]: Computing forward predicates... [2018-06-25 12:45:43,591 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2018-06-25 12:46:00,876 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 12:46:01,007 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 12:46:01,014 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 12:46:22,657 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 12:46:23,375 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 12:46:23,512 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-25 12:46:25,178 INFO ]: Timeout while computing interpolants [2018-06-25 12:46:25,379 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:46:25,379 WARN ]: Verification canceled [2018-06-25 12:46:25,394 WARN ]: Timeout [2018-06-25 12:46:25,394 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:46:25 BoogieIcfgContainer [2018-06-25 12:46:25,394 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 12:46:25,395 INFO ]: Toolchain (without parser) took 67795.88 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.1 MB in the beginning and 880.8 MB in the end (delta: -634.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:46:25,396 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 12:46:25,396 INFO ]: ChcToBoogie took 74.10 ms. Allocated memory is still 305.7 MB. Free memory was 246.1 MB in the beginning and 243.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:46:25,400 INFO ]: Boogie Preprocessor took 40.49 ms. Allocated memory is still 305.7 MB. Free memory was 243.1 MB in the beginning and 241.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-25 12:46:25,401 INFO ]: RCFGBuilder took 316.84 ms. Allocated memory is still 305.7 MB. Free memory was 241.0 MB in the beginning and 223.9 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 3.6 GB. [2018-06-25 12:46:25,402 INFO ]: TraceAbstraction took 67348.41 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 222.9 MB in the beginning and 880.8 MB in the end (delta: -657.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:46:25,417 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.10 ms. Allocated memory is still 305.7 MB. Free memory was 246.1 MB in the beginning and 243.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.49 ms. Allocated memory is still 305.7 MB. Free memory was 243.1 MB in the beginning and 241.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 316.84 ms. Allocated memory is still 305.7 MB. Free memory was 241.0 MB in the beginning and 223.9 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67348.41 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 222.9 MB in the beginning and 880.8 MB in the end (delta: -657.9 MB). 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 7755 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 67.2s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 33 SDs, 0 SdLazy, 16 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.0s 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, 23.2s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1760 SizeOfPredicates, 14 NumberOfNonLiveVariables, 415 ConjunctsInSsa, 54 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/apache-get-tag.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_12-46-25-439.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/apache-get-tag.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_12-46-25-439.csv Completed graceful shutdown