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/dillig20.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:54:30,974 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:54:30,976 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:54:30,993 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:54:30,994 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:54:30,995 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:54:30,996 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:54:31,000 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:54:31,002 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:54:31,003 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:54:31,004 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:54:31,004 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:54:31,005 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:54:31,006 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:54:31,007 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:54:31,008 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:54:31,009 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:54:31,023 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:54:31,025 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:54:31,026 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:54:31,027 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:54:31,029 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:54:31,030 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:54:31,030 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:54:31,031 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:54:31,032 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:54:31,032 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:54:31,033 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:54:31,034 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:54:31,034 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:54:31,035 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:54:31,040 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:54:31,041 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:54:31,042 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:54:31,042 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:54:31,042 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:54:31,064 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:54:31,064 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:54:31,064 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:54:31,065 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:54:31,066 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:54:31,066 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:54:31,066 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:54:31,066 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:54:31,066 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:54:31,068 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:54:31,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:54:31,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:54:31,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:54:31,069 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:54:31,069 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:54:31,069 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:54:31,069 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:54:31,069 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:54:31,069 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:54:31,070 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:54:31,070 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:54:31,072 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:54:31,073 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:54:31,120 INFO ]: Repository-Root is: /tmp [2018-06-25 12:54:31,137 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:54:31,142 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:54:31,143 INFO ]: Initializing SmtParser... [2018-06-25 12:54:31,144 INFO ]: SmtParser initialized [2018-06-25 12:54:31,144 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 [2018-06-25 12:54:31,146 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 12:54:31,243 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 unknown [2018-06-25 12:54:31,933 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig20.c.smt2 [2018-06-25 12:54:31,937 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:54:31,947 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:54:31,948 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:54:31,948 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:54:31,948 INFO ]: ChcToBoogie initialized [2018-06-25 12:54:31,951 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:54:31" (1/1) ... [2018-06-25 12:54:32,010 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32 Unit [2018-06-25 12:54:32,011 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:54:32,012 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:54:32,012 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:54:32,012 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:54:32,033 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,033 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,041 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,041 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,053 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,064 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,065 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... [2018-06-25 12:54:32,068 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:54:32,068 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:54:32,068 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:54:32,068 INFO ]: RCFGBuilder initialized [2018-06-25 12:54:32,069 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 12:54:32,092 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:54:32,092 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:54:32,092 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:54:32,093 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:54:32,093 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:54:32,093 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:54:32,345 INFO ]: Using library mode [2018-06-25 12:54:32,346 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:54:32 BoogieIcfgContainer [2018-06-25 12:54:32,346 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:54:32,347 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:54:32,347 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:54:32,350 INFO ]: TraceAbstraction initialized [2018-06-25 12:54:32,350 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:54:31" (1/3) ... [2018-06-25 12:54:32,351 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40704cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:54:32, skipping insertion in model container [2018-06-25 12:54:32,351 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:32" (2/3) ... [2018-06-25 12:54:32,352 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40704cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:54:32, skipping insertion in model container [2018-06-25 12:54:32,352 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:54:32" (3/3) ... [2018-06-25 12:54:32,353 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:54:32,363 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:54:32,371 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:54:32,421 INFO ]: Using default assertion order modulation [2018-06-25 12:54:32,421 INFO ]: Interprodecural is true [2018-06-25 12:54:32,421 INFO ]: Hoare is false [2018-06-25 12:54:32,421 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:54:32,421 INFO ]: Backedges is TWOTRACK [2018-06-25 12:54:32,422 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:54:32,422 INFO ]: Difference is false [2018-06-25 12:54:32,422 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:54:32,422 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:54:32,437 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:54:32,451 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:54:32,451 INFO ]: Found error trace [2018-06-25 12:54:32,452 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:32,452 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:32,457 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:54:32,459 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:32,459 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:32,495 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:32,495 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:32,495 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:32,534 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:32,666 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:32,668 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:54:32,669 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:54:32,670 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:54:32,680 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:54:32,680 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:54:32,682 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:54:32,733 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:32,733 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:54:32,733 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:54:32,734 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:54:32,735 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:32,747 INFO ]: With dead ends: 9 [2018-06-25 12:54:32,747 INFO ]: Without dead ends: 9 [2018-06-25 12:54:32,751 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 [2018-06-25 12:54:32,767 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:54:32,781 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:54:32,782 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:54:32,783 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:54:32,784 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:54:32,784 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:32,784 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:54:32,784 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:54:32,784 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:54:32,784 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:54:32,784 INFO ]: Found error trace [2018-06-25 12:54:32,784 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:32,785 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:32,785 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:54:32,785 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:32,785 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:32,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:32,786 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:32,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:32,831 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:32,986 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:32,986 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:32,986 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 12:54:32,995 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:33,063 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:33,072 INFO ]: Computing forward predicates... [2018-06-25 12:54:33,380 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 1 [2018-06-25 12:54:33,602 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:33,624 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:33,624 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 12:54:33,626 INFO ]: Interpolant automaton has 5 states [2018-06-25 12:54:33,626 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 12:54:33,626 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:54:33,627 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 12:54:33,681 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:33,681 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 12:54:33,682 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:54:33,682 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 12:54:33,682 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:33,682 INFO ]: With dead ends: 10 [2018-06-25 12:54:33,682 INFO ]: Without dead ends: 10 [2018-06-25 12:54:33,683 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:54:33,683 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 12:54:33,684 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 12:54:33,684 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 12:54:33,685 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 12:54:33,685 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 12:54:33,685 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:33,685 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 12:54:33,685 INFO ]: Interpolant automaton has 5 states. [2018-06-25 12:54:33,685 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 12:54:33,685 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 12:54:33,685 INFO ]: Found error trace [2018-06-25 12:54:33,685 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:33,686 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:33,686 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 12:54:33,686 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:33,686 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:33,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:33,687 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:33,687 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:33,787 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:33,936 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:33,936 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:33,936 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:54:33,943 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 12:54:34,027 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:54:34,027 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:34,030 INFO ]: Computing forward predicates... [2018-06-25 12:54:34,621 WARN ]: Spent 360.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-06-25 12:54:36,022 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:36,053 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:36,053 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 12:54:36,054 INFO ]: Interpolant automaton has 6 states [2018-06-25 12:54:36,054 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 12:54:36,054 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:54:36,054 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 12:54:36,287 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:36,287 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 12:54:36,288 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:54:36,288 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 12:54:36,288 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:36,288 INFO ]: With dead ends: 12 [2018-06-25 12:54:36,288 INFO ]: Without dead ends: 12 [2018-06-25 12:54:36,289 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-25 12:54:36,289 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 12:54:36,290 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 12:54:36,290 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 12:54:36,290 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 12:54:36,290 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 12:54:36,291 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:36,291 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 12:54:36,291 INFO ]: Interpolant automaton has 6 states. [2018-06-25 12:54:36,291 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 12:54:36,291 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 12:54:36,291 INFO ]: Found error trace [2018-06-25 12:54:36,291 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:36,291 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:36,291 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 12:54:36,291 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:36,291 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:36,292 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:36,292 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:54:36,292 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:36,394 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:36,673 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:36,673 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:36,673 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 12:54:36,678 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:54:36,745 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:54:36,745 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:36,750 INFO ]: Computing forward predicates... [2018-06-25 12:54:43,804 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:43,842 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:43,842 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 12:54:43,842 INFO ]: Interpolant automaton has 8 states [2018-06-25 12:54:43,842 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 12:54:43,842 INFO ]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-06-25 12:54:43,842 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 12:54:44,402 WARN ]: Spent 414.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 7 [2018-06-25 12:54:44,558 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:44,558 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 12:54:44,558 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 12:54:44,558 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 12:54:44,559 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:44,559 INFO ]: With dead ends: 13 [2018-06-25 12:54:44,559 INFO ]: Without dead ends: 13 [2018-06-25 12:54:44,559 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-06-25 12:54:44,559 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 12:54:44,561 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 12:54:44,561 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 12:54:44,561 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 12:54:44,561 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 12:54:44,561 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:44,561 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 12:54:44,561 INFO ]: Interpolant automaton has 8 states. [2018-06-25 12:54:44,561 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 12:54:44,562 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 12:54:44,562 INFO ]: Found error trace [2018-06-25 12:54:44,562 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:44,563 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:44,563 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 12:54:44,563 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:44,563 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:44,564 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:44,564 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:54:44,564 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:44,665 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:45,084 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-25 12:54:45,284 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-06-25 12:54:45,336 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:45,337 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:45,337 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:54:45,343 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 12:54:45,427 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 12:54:45,427 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:45,433 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 12:55:40,570 INFO ]: Timeout while computing interpolants [2018-06-25 12:55:40,770 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:55:40,771 WARN ]: Verification canceled [2018-06-25 12:55:40,777 WARN ]: Timeout [2018-06-25 12:55:40,777 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:55:40 BoogieIcfgContainer [2018-06-25 12:55:40,777 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 12:55:40,780 INFO ]: Toolchain (without parser) took 68841.88 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 254.5 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:55:40,781 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 12:55:40,781 INFO ]: ChcToBoogie took 63.91 ms. Allocated memory is still 305.1 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:55:40,782 INFO ]: Boogie Preprocessor took 55.95 ms. Allocated memory is still 305.1 MB. Free memory was 251.5 MB in the beginning and 250.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 12:55:40,782 INFO ]: RCFGBuilder took 277.49 ms. Allocated memory is still 305.1 MB. Free memory was 250.5 MB in the beginning and 237.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:55:40,782 INFO ]: TraceAbstraction took 68430.36 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 237.5 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 12:55:40,799 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 63.91 ms. Allocated memory is still 305.1 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 55.95 ms. Allocated memory is still 305.1 MB. Free memory was 251.5 MB in the beginning and 250.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 277.49 ms. Allocated memory is still 305.1 MB. Free memory was 250.5 MB in the beginning and 237.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 68430.36 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 237.5 MB in the beginning and 1.3 GB in the end (delta: -1.0 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 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 23 quantified variables from 21 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 68.3s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 4 SDslu, 46 SDs, 0 SdLazy, 24 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=4, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1713 SizeOfPredicates, 15 NumberOfNonLiveVariables, 557 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/28 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/dillig20.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_12-55-40-821.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig20.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_12-55-40-821.csv Completed graceful shutdown