java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:47:00,651 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:47:00,653 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:47:00,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:47:00,667 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:47:00,668 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:47:00,672 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:47:00,674 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:47:00,675 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:47:00,677 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:47:00,678 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:47:00,678 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:47:00,679 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:47:00,683 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:47:00,684 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:47:00,685 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:47:00,686 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:47:00,700 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:47:00,701 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:47:00,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:47:00,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:47:00,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:47:00,705 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:47:00,705 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:47:00,706 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:47:00,707 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:47:00,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:47:00,712 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:47:00,713 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:47:00,713 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:47:00,714 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:47:00,715 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:47:00,715 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:47:00,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:47:00,720 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:47:00,720 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:47:00,739 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:47:00,739 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:47:00,739 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:47:00,739 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:47:00,741 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:47:00,741 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:47:00,741 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:47:00,741 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:47:00,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:47:00,742 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:47:00,742 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:47:00,742 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:47:00,742 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:47:00,743 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:47:00,743 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:47:00,743 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:47:00,743 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:47:00,747 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:47:00,747 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:47:00,798 INFO ]: Repository-Root is: /tmp [2018-06-22 04:47:00,820 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:47:00,824 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:47:00,826 INFO ]: Initializing SmtParser... [2018-06-22 04:47:00,826 INFO ]: SmtParser initialized [2018-06-22 04:47:00,826 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 [2018-06-22 04:47:00,828 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 04:47:00,916 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 unknown [2018-06-22 04:47:01,933 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 [2018-06-22 04:47:01,938 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:47:01,945 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:47:01,946 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:47:01,946 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:47:01,946 INFO ]: ChcToBoogie initialized [2018-06-22 04:47:01,949 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:47:01" (1/1) ... [2018-06-22 04:47:02,027 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02 Unit [2018-06-22 04:47:02,028 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:47:02,028 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:47:02,028 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:47:02,028 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:47:02,070 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,070 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,101 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,102 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,129 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,130 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,144 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (1/1) ... [2018-06-22 04:47:02,155 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:47:02,155 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:47:02,155 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:47:02,155 INFO ]: RCFGBuilder initialized [2018-06-22 04:47:02,156 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (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 04:47:02,169 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:47:02,169 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:47:02,169 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:47:02,169 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:47:02,169 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:47:02,169 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 04:47:03,001 INFO ]: Using library mode [2018-06-22 04:47:03,002 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:47:03 BoogieIcfgContainer [2018-06-22 04:47:03,002 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:47:03,006 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:47:03,006 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:47:03,010 INFO ]: TraceAbstraction initialized [2018-06-22 04:47:03,010 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:47:01" (1/3) ... [2018-06-22 04:47:03,011 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fbf957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:47:03, skipping insertion in model container [2018-06-22 04:47:03,011 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:02" (2/3) ... [2018-06-22 04:47:03,011 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fbf957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:47:03, skipping insertion in model container [2018-06-22 04:47:03,011 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:47:03" (3/3) ... [2018-06-22 04:47:03,013 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:47:03,024 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:47:03,033 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:47:03,085 INFO ]: Using default assertion order modulation [2018-06-22 04:47:03,086 INFO ]: Interprodecural is true [2018-06-22 04:47:03,086 INFO ]: Hoare is false [2018-06-22 04:47:03,086 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:47:03,086 INFO ]: Backedges is TWOTRACK [2018-06-22 04:47:03,086 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:47:03,086 INFO ]: Difference is false [2018-06-22 04:47:03,086 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:47:03,086 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:47:03,108 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:47:03,119 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:47:03,119 INFO ]: Found error trace [2018-06-22 04:47:03,120 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:03,120 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:03,125 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:47:03,127 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:03,127 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:03,176 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:03,176 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:03,176 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:03,281 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:03,441 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:03,444 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:47:03,444 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:47:03,446 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:47:03,462 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:47:03,462 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:47:03,464 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:47:03,607 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:47:03,608 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:47:03,609 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:47:03,610 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:47:03,610 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:47:03,621 INFO ]: With dead ends: 9 [2018-06-22 04:47:03,622 INFO ]: Without dead ends: 9 [2018-06-22 04:47:03,624 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:47:03,642 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:47:03,659 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:47:03,660 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:47:03,660 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:47:03,662 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:47:03,662 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:47:03,662 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:47:03,662 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:47:03,662 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:47:03,662 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:47:03,662 INFO ]: Found error trace [2018-06-22 04:47:03,662 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:03,662 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:03,663 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:47:03,663 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:03,663 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:03,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:03,664 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:03,664 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:03,882 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:04,427 WARN ]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:47:04,428 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:04,428 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:47:04,428 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) [2018-06-22 04:47:04,441 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:47:04,656 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:04,679 INFO ]: Computing forward predicates... [2018-06-22 04:47:07,821 WARN ]: Spent 552.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2018-06-22 04:47:07,842 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:07,870 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:47:07,870 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:47:07,871 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:47:07,871 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:47:07,871 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:47:07,871 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:47:07,959 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:47:07,960 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:47:07,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 04:47:07,960 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:47:07,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:47:07,960 INFO ]: With dead ends: 11 [2018-06-22 04:47:07,960 INFO ]: Without dead ends: 11 [2018-06-22 04:47:07,961 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:47:07,961 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:47:07,962 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:47:07,962 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:47:07,962 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:47:07,962 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:47:07,963 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:47:07,963 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:47:07,963 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:47:07,963 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:47:07,963 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:47:07,963 INFO ]: Found error trace [2018-06-22 04:47:07,963 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:07,963 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:07,963 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 04:47:07,963 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:07,963 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:07,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:07,964 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:07,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:08,475 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:09,386 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:47:09,753 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 9 [2018-06-22 04:47:09,895 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:09,895 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:47:09,895 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:47:09,903 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:47:10,272 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:47:10,272 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:10,297 INFO ]: Computing forward predicates... [2018-06-22 04:47:12,019 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2018-06-22 04:47:37,394 WARN ]: Simplifying disjunction of 5782 conjuctions. This might take some time... [2018-06-22 04:47:39,499 INFO ]: Simplified to disjunction of 5782 conjuctions. [2018-06-22 04:47:39,529 WARN ]: Simplifying disjunction of 5786 conjuctions. This might take some time... [2018-06-22 04:47:41,578 INFO ]: Simplified to disjunction of 5786 conjuctions. [2018-06-22 04:47:52,662 WARN ]: Spent 1.84 s on a formula simplification. DAG size of input: 304 DAG size of output: 49 [2018-06-22 04:47:57,791 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2018-06-22 04:47:57,794 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:57,818 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:47:57,818 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:47:57,819 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:47:57,819 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:47:57,819 INFO ]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:47:57,819 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:47:58,017 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 04:47:58,065 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:47:58,065 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:47:58,066 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:47:58,066 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:47:58,066 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:47:58,066 INFO ]: With dead ends: 13 [2018-06-22 04:47:58,066 INFO ]: Without dead ends: 13 [2018-06-22 04:47:58,067 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-06-22 04:47:58,067 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:47:58,068 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:47:58,068 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:47:58,068 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:47:58,068 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 04:47:58,069 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:47:58,069 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:47:58,069 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:47:58,069 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:47:58,069 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:47:58,069 INFO ]: Found error trace [2018-06-22 04:47:58,069 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:58,069 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:58,069 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 04:47:58,069 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:58,070 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:58,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:58,070 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:47:58,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:58,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:59,775 WARN ]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 04:48:00,518 WARN ]: Spent 678.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 8 [2018-06-22 04:48:01,011 WARN ]: Spent 413.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 13 [2018-06-22 04:48:01,266 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:01,266 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:48:01,266 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:48:01,274 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:48:01,849 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:48:01,849 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:01,878 INFO ]: Computing forward predicates... [2018-06-22 04:48:01,993 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 04:48:02,451 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 Received shutdown request... [2018-06-22 04:48:03,657 INFO ]: Timeout while computing interpolants [2018-06-22 04:48:03,858 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:48:03,858 WARN ]: Verification canceled [2018-06-22 04:48:03,862 WARN ]: Timeout [2018-06-22 04:48:03,862 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:48:03 BoogieIcfgContainer [2018-06-22 04:48:03,862 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:48:03,863 INFO ]: Toolchain (without parser) took 61924.61 ms. Allocated memory was 324.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 280.1 MB in the beginning and 1.2 GB in the end (delta: -969.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:48:03,868 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:48:03,868 INFO ]: ChcToBoogie took 82.30 ms. Allocated memory is still 324.5 MB. Free memory was 278.6 MB in the beginning and 275.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:03,868 INFO ]: Boogie Preprocessor took 126.73 ms. Allocated memory is still 324.5 MB. Free memory was 275.5 MB in the beginning and 270.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:03,869 INFO ]: RCFGBuilder took 846.84 ms. Allocated memory was 324.5 MB in the beginning and 369.1 MB in the end (delta: 44.6 MB). Free memory was 270.8 MB in the beginning and 324.3 MB in the end (delta: -53.4 MB). Peak memory consumption was 99.8 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:03,869 INFO ]: TraceAbstraction took 60855.94 ms. Allocated memory was 369.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 323.5 MB in the beginning and 1.2 GB in the end (delta: -926.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:48:03,873 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 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 82.30 ms. Allocated memory is still 324.5 MB. Free memory was 278.6 MB in the beginning and 275.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 126.73 ms. Allocated memory is still 324.5 MB. Free memory was 275.5 MB in the beginning and 270.8 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 3.6 GB. * RCFGBuilder took 846.84 ms. Allocated memory was 324.5 MB in the beginning and 369.1 MB in the end (delta: 44.6 MB). Free memory was 270.8 MB in the beginning and 324.3 MB in the end (delta: -53.4 MB). Peak memory consumption was 99.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60855.94 ms. Allocated memory was 369.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 323.5 MB in the beginning and 1.2 GB in the end (delta: -926.0 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 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 225 quantified variables from 8 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 60.7s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 42 SDs, 0 SdLazy, 19 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 52.8s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 2784 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1526 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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/simple_array_inversion-8.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-48-03-890.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-8.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-48-03-890.csv Completed graceful shutdown