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/eldarica-misc/LIA/Consistency/graham.27.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 00:41:30,769 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 00:41:30,772 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 00:41:30,784 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 00:41:30,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 00:41:30,786 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 00:41:30,789 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 00:41:30,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 00:41:30,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 00:41:30,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 00:41:30,797 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 00:41:30,798 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 00:41:30,800 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 00:41:30,801 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 00:41:30,802 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 00:41:30,802 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 00:41:30,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 00:41:30,807 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 00:41:30,817 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 00:41:30,818 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 00:41:30,819 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 00:41:30,820 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-22 00:41:30,837 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 00:41:30,855 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 00:41:30,855 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 00:41:30,855 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 00:41:30,855 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 00:41:30,856 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 00:41:30,856 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 00:41:30,857 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 00:41:30,858 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 00:41:30,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 00:41:30,858 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 00:41:30,858 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 00:41:30,858 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 00:41:30,859 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 00:41:30,859 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 00:41:30,859 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 00:41:30,859 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 00:41:30,859 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 00:41:30,861 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 00:41:30,862 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 00:41:30,903 INFO ]: Repository-Root is: /tmp [2018-06-22 00:41:30,915 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 00:41:30,920 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 00:41:30,921 INFO ]: Initializing SmtParser... [2018-06-22 00:41:30,921 INFO ]: SmtParser initialized [2018-06-22 00:41:30,922 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/Consistency/graham.27.smt2 [2018-06-22 00:41:30,923 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 00:41:31,013 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/Consistency/graham.27.smt2 unknown [2018-06-22 00:41:31,426 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/Consistency/graham.27.smt2 [2018-06-22 00:41:31,431 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 00:41:31,438 INFO ]: Walking toolchain with 4 elements. [2018-06-22 00:41:31,439 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 00:41:31,439 INFO ]: Initializing ChcToBoogie... [2018-06-22 00:41:31,439 INFO ]: ChcToBoogie initialized [2018-06-22 00:41:31,442 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,545 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31 Unit [2018-06-22 00:41:31,545 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 00:41:31,546 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 00:41:31,546 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 00:41:31,546 INFO ]: Boogie Preprocessor initialized [2018-06-22 00:41:31,567 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,568 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,590 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,591 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,619 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,623 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,636 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (1/1) ... [2018-06-22 00:41:31,640 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 00:41:31,641 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 00:41:31,641 INFO ]: Initializing RCFGBuilder... [2018-06-22 00:41:31,641 INFO ]: RCFGBuilder initialized [2018-06-22 00:41:31,642 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (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 00:41:31,671 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 00:41:31,671 INFO ]: Found specification of procedure gotoProc [2018-06-22 00:41:31,671 INFO ]: Found implementation of procedure gotoProc [2018-06-22 00:41:31,671 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 00:41:31,671 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 00:41:31,671 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 00:41:33,284 INFO ]: Using library mode [2018-06-22 00:41:33,284 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:41:33 BoogieIcfgContainer [2018-06-22 00:41:33,284 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 00:41:33,286 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 00:41:33,286 INFO ]: Initializing TraceAbstraction... [2018-06-22 00:41:33,289 INFO ]: TraceAbstraction initialized [2018-06-22 00:41:33,289 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:41:31" (1/3) ... [2018-06-22 00:41:33,290 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798c927c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:41:33, skipping insertion in model container [2018-06-22 00:41:33,290 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:41:31" (2/3) ... [2018-06-22 00:41:33,290 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798c927c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:41:33, skipping insertion in model container [2018-06-22 00:41:33,290 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:41:33" (3/3) ... [2018-06-22 00:41:33,294 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 00:41:33,303 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 00:41:33,311 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 00:41:33,354 INFO ]: Using default assertion order modulation [2018-06-22 00:41:33,354 INFO ]: Interprodecural is true [2018-06-22 00:41:33,354 INFO ]: Hoare is false [2018-06-22 00:41:33,354 INFO ]: Compute interpolants for FPandBP [2018-06-22 00:41:33,354 INFO ]: Backedges is TWOTRACK [2018-06-22 00:41:33,354 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 00:41:33,355 INFO ]: Difference is false [2018-06-22 00:41:33,355 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 00:41:33,355 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 00:41:33,375 INFO ]: Start isEmpty. Operand 145 states. [2018-06-22 00:41:33,389 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 00:41:33,390 INFO ]: Found error trace [2018-06-22 00:41:33,391 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:41:33,391 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:41:33,395 INFO ]: Analyzing trace with hash -570017042, now seen corresponding path program 1 times [2018-06-22 00:41:33,396 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:41:33,396 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:41:33,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:33,429 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:33,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:33,496 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:33,705 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 00:41:33,707 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 00:41:33,791 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 00:41:33,793 INFO ]: Interpolant automaton has 4 states [2018-06-22 00:41:33,807 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 00:41:33,807 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 00:41:33,810 INFO ]: Start difference. First operand 145 states. Second operand 4 states. [2018-06-22 00:41:36,785 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 00:41:36,785 INFO ]: Finished difference Result 283 states and 547 transitions. [2018-06-22 00:41:36,785 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 00:41:36,787 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-22 00:41:36,787 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 00:41:36,847 INFO ]: With dead ends: 283 [2018-06-22 00:41:36,847 INFO ]: Without dead ends: 269 [2018-06-22 00:41:36,849 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 00:41:36,878 INFO ]: Start minimizeSevpa. Operand 269 states. [2018-06-22 00:41:36,995 INFO ]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-06-22 00:41:36,996 INFO ]: Start removeUnreachable. Operand 269 states. [2018-06-22 00:41:37,020 INFO ]: Finished removeUnreachable. Reduced from 269 states to 269 states and 523 transitions. [2018-06-22 00:41:37,022 INFO ]: Start accepts. Automaton has 269 states and 523 transitions. Word has length 7 [2018-06-22 00:41:37,023 INFO ]: Finished accepts. word is rejected. [2018-06-22 00:41:37,023 INFO ]: Abstraction has 269 states and 523 transitions. [2018-06-22 00:41:37,023 INFO ]: Interpolant automaton has 4 states. [2018-06-22 00:41:37,023 INFO ]: Start isEmpty. Operand 269 states and 523 transitions. [2018-06-22 00:41:37,037 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 00:41:37,037 INFO ]: Found error trace [2018-06-22 00:41:37,037 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:41:37,038 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:41:37,038 INFO ]: Analyzing trace with hash 1905517488, now seen corresponding path program 1 times [2018-06-22 00:41:37,038 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:41:37,038 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:41:37,039 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:37,039 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:37,039 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:37,060 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:37,191 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 00:41:37,191 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 00:41:37,191 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 00:41:37,192 INFO ]: Interpolant automaton has 4 states [2018-06-22 00:41:37,193 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 00:41:37,193 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 00:41:37,193 INFO ]: Start difference. First operand 269 states and 523 transitions. Second operand 4 states. [2018-06-22 00:41:39,077 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 00:41:39,077 INFO ]: Finished difference Result 402 states and 783 transitions. [2018-06-22 00:41:39,158 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 00:41:39,158 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 00:41:39,158 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 00:41:39,187 INFO ]: With dead ends: 402 [2018-06-22 00:41:39,187 INFO ]: Without dead ends: 402 [2018-06-22 00:41:39,188 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 00:41:39,188 INFO ]: Start minimizeSevpa. Operand 402 states. [2018-06-22 00:41:39,295 INFO ]: Finished minimizeSevpa. Reduced states from 402 to 402. [2018-06-22 00:41:39,295 INFO ]: Start removeUnreachable. Operand 402 states. [2018-06-22 00:41:39,312 INFO ]: Finished removeUnreachable. Reduced from 402 states to 402 states and 783 transitions. [2018-06-22 00:41:39,312 INFO ]: Start accepts. Automaton has 402 states and 783 transitions. Word has length 9 [2018-06-22 00:41:39,312 INFO ]: Finished accepts. word is rejected. [2018-06-22 00:41:39,312 INFO ]: Abstraction has 402 states and 783 transitions. [2018-06-22 00:41:39,312 INFO ]: Interpolant automaton has 4 states. [2018-06-22 00:41:39,312 INFO ]: Start isEmpty. Operand 402 states and 783 transitions. [2018-06-22 00:41:39,332 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 00:41:39,332 INFO ]: Found error trace [2018-06-22 00:41:39,332 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:41:39,332 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:41:39,332 INFO ]: Analyzing trace with hash 2089449569, now seen corresponding path program 1 times [2018-06-22 00:41:39,332 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:41:39,332 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:41:39,333 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:39,333 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:39,333 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:39,384 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:39,706 INFO ]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 00:41:39,706 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 00:41:39,706 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 00:41:39,713 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:39,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:39,780 INFO ]: Computing forward predicates... [2018-06-22 00:41:39,815 INFO ]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 00:41:39,851 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 00:41:39,852 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 00:41:39,852 INFO ]: Interpolant automaton has 8 states [2018-06-22 00:41:39,852 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 00:41:39,852 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-22 00:41:39,852 INFO ]: Start difference. First operand 402 states and 783 transitions. Second operand 8 states. [2018-06-22 00:41:40,191 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 00:41:48,867 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 00:41:48,867 INFO ]: Finished difference Result 1574 states and 6229 transitions. [2018-06-22 00:41:48,868 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 00:41:48,868 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 00:41:48,868 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 00:41:49,243 INFO ]: With dead ends: 1574 [2018-06-22 00:41:49,243 INFO ]: Without dead ends: 1333 [2018-06-22 00:41:49,243 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-06-22 00:41:49,244 INFO ]: Start minimizeSevpa. Operand 1333 states. [2018-06-22 00:41:49,743 INFO ]: Finished minimizeSevpa. Reduced states from 1333 to 657. [2018-06-22 00:41:49,744 INFO ]: Start removeUnreachable. Operand 657 states. [2018-06-22 00:41:49,775 INFO ]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1438 transitions. [2018-06-22 00:41:49,776 INFO ]: Start accepts. Automaton has 657 states and 1438 transitions. Word has length 17 [2018-06-22 00:41:49,776 INFO ]: Finished accepts. word is rejected. [2018-06-22 00:41:49,776 INFO ]: Abstraction has 657 states and 1438 transitions. [2018-06-22 00:41:49,776 INFO ]: Interpolant automaton has 8 states. [2018-06-22 00:41:49,776 INFO ]: Start isEmpty. Operand 657 states and 1438 transitions. [2018-06-22 00:41:49,803 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 00:41:49,803 INFO ]: Found error trace [2018-06-22 00:41:49,803 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:41:49,803 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:41:49,803 INFO ]: Analyzing trace with hash 2090134762, now seen corresponding path program 1 times [2018-06-22 00:41:49,803 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:41:49,803 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:41:49,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:49,804 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:49,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:49,834 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:50,319 INFO ]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 00:41:50,319 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 00:41:50,319 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 00:41:50,319 INFO ]: Interpolant automaton has 7 states [2018-06-22 00:41:50,320 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 00:41:50,320 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 00:41:50,320 INFO ]: Start difference. First operand 657 states and 1438 transitions. Second operand 7 states. [2018-06-22 00:41:56,670 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 00:41:56,671 INFO ]: Finished difference Result 2269 states and 14104 transitions. [2018-06-22 00:41:56,671 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 00:41:56,671 INFO ]: Start accepts. Automaton has 7 states. Word has length 17 [2018-06-22 00:41:56,671 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 00:41:57,295 INFO ]: With dead ends: 2269 [2018-06-22 00:41:57,295 INFO ]: Without dead ends: 2269 [2018-06-22 00:41:57,295 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 00:41:57,297 INFO ]: Start minimizeSevpa. Operand 2269 states. [2018-06-22 00:41:58,471 INFO ]: Finished minimizeSevpa. Reduced states from 2269 to 1067. [2018-06-22 00:41:58,471 INFO ]: Start removeUnreachable. Operand 1067 states. [2018-06-22 00:41:58,543 INFO ]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2554 transitions. [2018-06-22 00:41:58,543 INFO ]: Start accepts. Automaton has 1067 states and 2554 transitions. Word has length 17 [2018-06-22 00:41:58,543 INFO ]: Finished accepts. word is rejected. [2018-06-22 00:41:58,543 INFO ]: Abstraction has 1067 states and 2554 transitions. [2018-06-22 00:41:58,543 INFO ]: Interpolant automaton has 7 states. [2018-06-22 00:41:58,543 INFO ]: Start isEmpty. Operand 1067 states and 2554 transitions. [2018-06-22 00:41:58,582 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 00:41:58,582 INFO ]: Found error trace [2018-06-22 00:41:58,583 INFO ]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:41:58,583 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:41:58,583 INFO ]: Analyzing trace with hash -906930133, now seen corresponding path program 1 times [2018-06-22 00:41:58,583 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:41:58,583 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:41:58,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:58,584 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:41:58,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:41:58,619 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:58,749 INFO ]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 00:41:58,749 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 00:41:58,749 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) [2018-06-22 00:41:58,767 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 00:41:58,812 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:41:58,815 INFO ]: Computing forward predicates... [2018-06-22 00:41:58,843 INFO ]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 00:41:58,874 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 00:41:58,874 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 00:41:58,874 INFO ]: Interpolant automaton has 9 states [2018-06-22 00:41:58,874 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 00:41:58,875 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 00:41:58,875 INFO ]: Start difference. First operand 1067 states and 2554 transitions. Second operand 9 states. [2018-06-22 00:42:10,042 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 00:42:10,042 INFO ]: Finished difference Result 4349 states and 30956 transitions. [2018-06-22 00:42:10,042 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 00:42:10,042 INFO ]: Start accepts. Automaton has 9 states. Word has length 18 [2018-06-22 00:42:10,042 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 00:42:11,975 INFO ]: With dead ends: 4349 [2018-06-22 00:42:11,975 INFO ]: Without dead ends: 4349 [2018-06-22 00:42:11,975 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-06-22 00:42:11,977 INFO ]: Start minimizeSevpa. Operand 4349 states. [2018-06-22 00:42:14,352 INFO ]: Finished minimizeSevpa. Reduced states from 4349 to 2679. [2018-06-22 00:42:14,352 INFO ]: Start removeUnreachable. Operand 2679 states. [2018-06-22 00:42:14,610 INFO ]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 8866 transitions. [2018-06-22 00:42:14,610 INFO ]: Start accepts. Automaton has 2679 states and 8866 transitions. Word has length 18 [2018-06-22 00:42:14,611 INFO ]: Finished accepts. word is rejected. [2018-06-22 00:42:14,611 INFO ]: Abstraction has 2679 states and 8866 transitions. [2018-06-22 00:42:14,611 INFO ]: Interpolant automaton has 9 states. [2018-06-22 00:42:14,611 INFO ]: Start isEmpty. Operand 2679 states and 8866 transitions. [2018-06-22 00:42:14,687 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 00:42:14,687 INFO ]: Found error trace [2018-06-22 00:42:14,687 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 00:42:14,687 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 00:42:14,689 INFO ]: Analyzing trace with hash 523001908, now seen corresponding path program 1 times [2018-06-22 00:42:14,689 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 00:42:14,689 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 00:42:14,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:42:14,690 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 00:42:14,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 00:42:14,717 INFO ]: Conjunction of SSA is unsat [2018-06-22 00:42:15,082 INFO ]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 00:42:15,082 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 00:42:15,082 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 00:42:15,082 INFO ]: Interpolant automaton has 7 states [2018-06-22 00:42:15,082 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 00:42:15,083 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 00:42:15,083 INFO ]: Start difference. First operand 2679 states and 8866 transitions. Second operand 7 states. Received shutdown request... [2018-06-22 00:42:29,850 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 00:42:29,850 WARN ]: Verification canceled [2018-06-22 00:42:29,855 WARN ]: Timeout [2018-06-22 00:42:29,855 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:42:29 BoogieIcfgContainer [2018-06-22 00:42:29,855 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 00:42:29,856 INFO ]: Toolchain (without parser) took 58424.73 ms. Allocated memory was 308.8 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 251.2 MB in the beginning and 355.7 MB in the end (delta: -104.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 00:42:29,857 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 00:42:29,857 INFO ]: ChcToBoogie took 106.74 ms. Allocated memory is still 308.8 MB. Free memory was 251.2 MB in the beginning and 245.3 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-22 00:42:29,858 INFO ]: Boogie Preprocessor took 94.28 ms. Allocated memory is still 308.8 MB. Free memory was 245.3 MB in the beginning and 243.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 00:42:29,858 INFO ]: RCFGBuilder took 1643.59 ms. Allocated memory was 308.8 MB in the beginning and 324.0 MB in the end (delta: 15.2 MB). Free memory was 243.3 MB in the beginning and 281.2 MB in the end (delta: -37.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 3.6 GB. [2018-06-22 00:42:29,859 INFO ]: TraceAbstraction took 56569.51 ms. Allocated memory was 324.0 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 281.2 MB in the beginning and 355.7 MB in the end (delta: -74.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 00:42:29,867 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 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 106.74 ms. Allocated memory is still 308.8 MB. Free memory was 251.2 MB in the beginning and 245.3 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 94.28 ms. Allocated memory is still 308.8 MB. Free memory was 245.3 MB in the beginning and 243.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1643.59 ms. Allocated memory was 308.8 MB in the beginning and 324.0 MB in the end (delta: 15.2 MB). Free memory was 243.3 MB in the beginning and 281.2 MB in the end (delta: -37.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 3.6 GB. * TraceAbstraction took 56569.51 ms. Allocated memory was 324.0 MB in the beginning and 1.7 GB in the end (delta: 1.3 GB). Free memory was 281.2 MB in the beginning and 355.7 MB in the end (delta: -74.5 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 constructing difference of abstraction (2679states) and interpolant automaton (currently 19 states, 7 states before enhancement), while ReachableStatesComputation was computing reachable states (9217 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 145 locations, 1 error locations. TIMEOUT Result, 56.5s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 49.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6572 SDtfs, 1433 SDslu, 15226 SDs, 0 SdLazy, 27181 SolverSat, 5907 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2679occurred in iteration=5, 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: 4.6s AutomataMinimizationTime, 5 MinimizatonAttempts, 3548 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 4395 SizeOfPredicates, 12 NumberOfNonLiveVariables, 833 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 27/31 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/graham.27.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_00-42-29-879.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/graham.27.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_00-42-29-879.csv Completed graceful shutdown