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/lifnat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:07:47,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:07:47,646 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:07:47,661 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:07:47,662 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:07:47,663 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:07:47,666 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:07:47,669 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:07:47,670 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:07:47,672 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:07:47,673 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:07:47,673 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:07:47,674 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:07:47,679 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:07:47,680 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:07:47,680 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:07:47,693 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:07:47,695 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:07:47,696 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:07:47,697 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:07:47,698 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:07:47,700 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:07:47,701 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:07:47,701 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:07:47,705 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:07:47,706 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:07:47,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:07:47,707 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:07:47,711 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:07:47,711 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:07:47,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:07:47,712 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:07:47,712 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:07:47,713 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:07:47,717 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:07:47,717 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:07:47,738 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:07:47,741 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:07:47,741 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:07:47,741 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:07:47,742 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:07:47,742 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:07:47,743 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:07:47,743 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:07:47,743 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:07:47,743 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:07:47,743 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:07:47,743 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:07:47,745 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:07:47,745 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:07:47,745 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:07:47,745 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:07:47,745 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:07:47,746 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:07:47,746 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:07:47,746 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:07:47,746 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:07:47,747 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:07:47,748 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:07:47,798 INFO ]: Repository-Root is: /tmp [2018-06-25 13:07:47,815 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:07:47,820 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:07:47,821 INFO ]: Initializing SmtParser... [2018-06-25 13:07:47,822 INFO ]: SmtParser initialized [2018-06-25 13:07:47,822 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-25 13:07:47,823 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 13:07:47,916 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 unknown [2018-06-25 13:07:48,458 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-25 13:07:48,466 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:07:48,475 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:07:48,475 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:07:48,475 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:07:48,475 INFO ]: ChcToBoogie initialized [2018-06-25 13:07:48,479 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,556 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48 Unit [2018-06-25 13:07:48,556 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:07:48,557 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:07:48,557 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:07:48,557 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:07:48,577 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,577 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,596 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,596 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,628 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,630 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,635 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (1/1) ... [2018-06-25 13:07:48,639 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:07:48,639 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:07:48,639 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:07:48,639 INFO ]: RCFGBuilder initialized [2018-06-25 13:07:48,640 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (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 13:07:48,659 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:07:48,659 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:07:48,660 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:07:48,660 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:07:48,660 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:07:48,660 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 13:07:49,112 INFO ]: Using library mode [2018-06-25 13:07:49,113 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:07:49 BoogieIcfgContainer [2018-06-25 13:07:49,113 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:07:49,115 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:07:49,115 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:07:49,118 INFO ]: TraceAbstraction initialized [2018-06-25 13:07:49,118 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:07:48" (1/3) ... [2018-06-25 13:07:49,119 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155763bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:07:49, skipping insertion in model container [2018-06-25 13:07:49,119 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:07:48" (2/3) ... [2018-06-25 13:07:49,119 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155763bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:07:49, skipping insertion in model container [2018-06-25 13:07:49,119 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:07:49" (3/3) ... [2018-06-25 13:07:49,121 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:07:49,130 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:07:49,138 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:07:49,185 INFO ]: Using default assertion order modulation [2018-06-25 13:07:49,186 INFO ]: Interprodecural is true [2018-06-25 13:07:49,186 INFO ]: Hoare is false [2018-06-25 13:07:49,186 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:07:49,186 INFO ]: Backedges is TWOTRACK [2018-06-25 13:07:49,186 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:07:49,186 INFO ]: Difference is false [2018-06-25 13:07:49,186 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:07:49,186 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:07:49,202 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:07:49,215 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:07:49,215 INFO ]: Found error trace [2018-06-25 13:07:49,216 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:07:49,216 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:07:49,223 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:07:49,224 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:07:49,224 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:07:49,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:49,257 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:07:49,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:49,323 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:49,443 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:49,444 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:07:49,445 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:07:49,446 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:07:49,456 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:07:49,456 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:07:49,458 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:07:49,544 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:07:49,545 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:07:49,546 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:07:49,547 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:07:49,548 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:07:49,558 INFO ]: With dead ends: 9 [2018-06-25 13:07:49,558 INFO ]: Without dead ends: 9 [2018-06-25 13:07:49,560 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 13:07:49,576 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:07:49,597 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:07:49,598 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:07:49,599 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:07:49,600 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:07:49,600 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:07:49,600 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:07:49,600 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:07:49,600 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:07:49,601 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:07:49,601 INFO ]: Found error trace [2018-06-25 13:07:49,601 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:07:49,601 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:07:49,601 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:07:49,601 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:07:49,601 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:07:49,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:49,602 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:07:49,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:49,746 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:50,141 WARN ]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 13:07:50,142 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:50,142 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:07:50,142 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 13:07:50,160 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:07:50,281 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:50,292 INFO ]: Computing forward predicates... [2018-06-25 13:07:51,008 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 7 [2018-06-25 13:07:52,257 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:52,277 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:07:52,277 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:07:52,278 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:07:52,278 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:07:52,278 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:07:52,278 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:07:52,406 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:07:52,406 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:07:52,406 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:07:52,406 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:07:52,406 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:07:52,407 INFO ]: With dead ends: 10 [2018-06-25 13:07:52,407 INFO ]: Without dead ends: 10 [2018-06-25 13:07:52,408 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:07:52,408 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:07:52,408 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:07:52,408 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:07:52,409 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:07:52,409 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:07:52,409 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:07:52,409 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:07:52,409 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:07:52,409 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:07:52,409 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:07:52,409 INFO ]: Found error trace [2018-06-25 13:07:52,409 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:07:52,410 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:07:52,410 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:07:52,410 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:07:52,410 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:07:52,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:52,411 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:07:52,411 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:52,522 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:53,300 WARN ]: Spent 566.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-25 13:07:53,564 WARN ]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-25 13:07:53,565 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:53,565 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:07:53,565 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 13:07:53,582 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:07:53,720 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:07:53,720 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:53,724 INFO ]: Computing forward predicates... [2018-06-25 13:07:58,460 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:58,483 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:07:58,483 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:07:58,483 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:07:58,483 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:07:58,483 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:07:58,483 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:07:58,685 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:07:58,685 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:07:58,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:07:58,704 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:07:58,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:07:58,704 INFO ]: With dead ends: 11 [2018-06-25 13:07:58,705 INFO ]: Without dead ends: 11 [2018-06-25 13:07:58,705 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:07:58,705 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:07:58,706 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:07:58,706 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:07:58,706 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:07:58,706 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:07:58,707 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:07:58,707 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:07:58,707 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:07:58,707 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:07:58,707 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:07:58,707 INFO ]: Found error trace [2018-06-25 13:07:58,707 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:07:58,707 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:07:58,707 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:07:58,707 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:07:58,707 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:07:58,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:58,708 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:07:58,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:07:58,896 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:59,224 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 8 [2018-06-25 13:07:59,288 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:07:59,288 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:07:59,288 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 13:07:59,306 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:07:59,455 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:07:59,455 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:07:59,463 INFO ]: Computing forward predicates... [2018-06-25 13:08:00,477 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 9 Received shutdown request... [2018-06-25 13:08:59,003 INFO ]: Timeout while computing interpolants [2018-06-25 13:08:59,234 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:08:59,234 WARN ]: Verification canceled [2018-06-25 13:08:59,239 WARN ]: Timeout [2018-06-25 13:08:59,239 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:08:59 BoogieIcfgContainer [2018-06-25 13:08:59,239 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:08:59,240 INFO ]: Toolchain (without parser) took 70773.16 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 231.3 MB in the beginning and 915.0 MB in the end (delta: -683.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:08:59,242 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:08:59,242 INFO ]: ChcToBoogie took 81.13 ms. Allocated memory is still 308.8 MB. Free memory was 231.3 MB in the beginning and 228.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:08:59,243 INFO ]: Boogie Preprocessor took 82.40 ms. Allocated memory is still 308.8 MB. Free memory was 228.3 MB in the beginning and 226.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:08:59,243 INFO ]: RCFGBuilder took 473.47 ms. Allocated memory is still 308.8 MB. Free memory was 226.3 MB in the beginning and 196.9 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 3.6 GB. [2018-06-25 13:08:59,244 INFO ]: TraceAbstraction took 70124.43 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 196.9 MB in the beginning and 915.0 MB in the end (delta: -718.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-25 13:08:59,249 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 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 81.13 ms. Allocated memory is still 308.8 MB. Free memory was 231.3 MB in the beginning and 228.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 82.40 ms. Allocated memory is still 308.8 MB. Free memory was 228.3 MB in the beginning and 226.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 473.47 ms. Allocated memory is still 308.8 MB. Free memory was 226.3 MB in the beginning and 196.9 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 70124.43 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 196.9 MB in the beginning and 915.0 MB in the end (delta: -718.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 20 quantified variables from 43 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 70.0s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 34 SDs, 0 SdLazy, 17 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 746 SizeOfPredicates, 14 NumberOfNonLiveVariables, 632 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-08-59-264.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-08-59-264.csv Completed graceful shutdown