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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:28:41,783 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:28:41,785 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:28:41,799 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:28:41,799 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:28:41,800 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:28:41,804 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:28:41,806 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:28:41,807 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:28:41,809 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:28:41,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:28:41,810 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:28:41,811 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:28:41,812 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:28:41,816 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:28:41,817 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:28:41,818 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:28:41,831 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:28:41,833 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:28:41,833 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:28:41,834 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:28:41,836 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:28:41,837 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:28:41,837 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:28:41,838 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:28:41,844 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:28:41,845 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:28:41,846 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:28:41,846 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:28:41,847 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:28:41,847 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:28:41,848 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:28:41,848 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:28:41,852 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:28:41,853 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:28:41,853 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:28:41,878 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:28:41,878 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:28:41,878 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:28:41,878 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:28:41,880 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:28:41,880 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:28:41,881 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:28:41,881 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:28:41,881 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:28:41,881 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:28:41,881 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:28:41,882 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:28:41,882 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:28:41,883 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:28:41,884 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:28:41,926 INFO ]: Repository-Root is: /tmp [2018-06-22 14:28:41,941 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:28:41,946 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:28:41,947 INFO ]: Initializing SmtParser... [2018-06-22 14:28:41,947 INFO ]: SmtParser initialized [2018-06-22 14:28:41,948 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 [2018-06-22 14:28:41,949 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 14:28:42,039 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 unknown [2018-06-22 14:28:47,486 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.11.smt2 [2018-06-22 14:28:47,590 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:28:47,594 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:28:47,595 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:28:47,595 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:28:47,595 INFO ]: ChcToBoogie initialized [2018-06-22 14:28:47,598 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,719 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47 Unit [2018-06-22 14:28:47,719 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:28:47,720 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:28:47,720 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:28:47,720 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:28:47,740 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,740 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,797 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,798 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,870 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,871 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,902 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... [2018-06-22 14:28:47,930 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:28:47,931 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:28:47,931 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:28:47,931 INFO ]: RCFGBuilder initialized [2018-06-22 14:28:47,932 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:28:47,942 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:28:47,942 INFO ]: Found specification of procedure False [2018-06-22 14:28:47,942 INFO ]: Found implementation of procedure False [2018-06-22 14:28:47,942 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:28:47,942 INFO ]: Found specification of procedure state [2018-06-22 14:28:47,942 INFO ]: Found implementation of procedure state [2018-06-22 14:28:47,942 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:28:47,942 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:28:47,942 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:28:55,503 INFO ]: Using library mode [2018-06-22 14:28:55,504 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:28:55 BoogieIcfgContainer [2018-06-22 14:28:55,504 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:28:55,505 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:28:55,505 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:28:55,511 INFO ]: TraceAbstraction initialized [2018-06-22 14:28:55,512 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:28:47" (1/3) ... [2018-06-22 14:28:55,512 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a47454e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:28:55, skipping insertion in model container [2018-06-22 14:28:55,513 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:28:47" (2/3) ... [2018-06-22 14:28:55,513 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a47454e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:28:55, skipping insertion in model container [2018-06-22 14:28:55,513 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:28:55" (3/3) ... [2018-06-22 14:28:55,515 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:28:55,525 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:28:55,534 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:28:55,581 INFO ]: Using default assertion order modulation [2018-06-22 14:28:55,582 INFO ]: Interprodecural is true [2018-06-22 14:28:55,582 INFO ]: Hoare is false [2018-06-22 14:28:55,582 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:28:55,582 INFO ]: Backedges is TWOTRACK [2018-06-22 14:28:55,582 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:28:55,582 INFO ]: Difference is false [2018-06-22 14:28:55,582 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:28:55,582 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:28:55,599 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:28:55,612 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:28:55,612 INFO ]: Found error trace [2018-06-22 14:28:55,613 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:28:55,613 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:28:55,619 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:28:55,621 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:28:55,622 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:28:55,668 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:55,668 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:28:55,668 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:55,877 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:28:56,167 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:28:56,170 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:28:56,170 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:28:56,172 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:28:56,186 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:28:56,187 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:28:56,189 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:28:56,680 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:28:56,681 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:28:56,684 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:28:56,685 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:28:56,686 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:28:56,698 INFO ]: With dead ends: 13 [2018-06-22 14:28:56,698 INFO ]: Without dead ends: 13 [2018-06-22 14:28:56,700 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:28:56,717 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:28:56,754 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:28:56,755 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:28:56,756 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:28:56,757 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:28:56,757 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:28:56,757 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:28:56,757 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:28:56,757 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:28:56,760 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:28:56,760 INFO ]: Found error trace [2018-06-22 14:28:56,760 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:28:56,760 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:28:56,760 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:28:56,760 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:28:56,761 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:28:56,761 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:56,761 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:28:56,761 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:57,561 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:28:58,955 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:28:59,170 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:28:59,259 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:28:59,259 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:28:59,259 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 14:28:59,271 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:28:59,835 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:28:59,889 INFO ]: Computing forward predicates... [2018-06-22 14:29:00,128 WARN ]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:29:04,837 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2018-06-22 14:29:05,006 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:29:05,031 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:29:05,031 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:29:05,032 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:29:05,032 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:29:05,032 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:29:05,032 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:29:05,451 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2018-06-22 14:29:05,736 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2018-06-22 14:29:05,819 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:29:05,820 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:29:05,821 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:29:05,821 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:29:05,821 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:29:05,822 INFO ]: With dead ends: 15 [2018-06-22 14:29:05,822 INFO ]: Without dead ends: 15 [2018-06-22 14:29:05,822 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:29:05,823 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:29:05,824 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:29:05,824 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:29:05,824 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:29:05,824 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:29:05,824 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:29:05,824 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:29:05,824 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:29:05,824 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:29:05,828 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:29:05,828 INFO ]: Found error trace [2018-06-22 14:29:05,828 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:05,828 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:05,828 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:29:05,828 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:05,828 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:05,829 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:05,829 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:29:05,829 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:06,790 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:08,578 WARN ]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:29:08,632 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:29:08,632 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:29:08,632 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 14:29:08,642 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:29:09,505 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:29:09,505 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:09,586 INFO ]: Computing forward predicates... [2018-06-22 14:29:17,345 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2018-06-22 14:29:17,516 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:29:17,557 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:29:17,557 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:29:17,557 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:29:17,557 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:29:17,557 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:29:17,558 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:29:17,933 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2018-06-22 14:29:18,147 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2018-06-22 14:29:18,367 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-06-22 14:29:18,458 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:29:18,458 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:29:18,459 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:29:18,459 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:29:18,459 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:29:18,460 INFO ]: With dead ends: 17 [2018-06-22 14:29:18,460 INFO ]: Without dead ends: 17 [2018-06-22 14:29:18,460 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:29:18,460 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:29:18,462 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:29:18,462 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:29:18,463 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:29:18,463 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:29:18,463 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:29:18,463 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:29:18,463 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:29:18,463 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:29:18,464 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:29:18,464 INFO ]: Found error trace [2018-06-22 14:29:18,464 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:29:18,464 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:29:18,464 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:29:18,464 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:29:18,464 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:29:18,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:18,465 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:29:18,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:29:19,691 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:21,310 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:29:21,310 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:29:21,332 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 14:29:21,339 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:29:22,497 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:29:22,497 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:29:22,614 INFO ]: Computing forward predicates... [2018-06-22 14:29:25,010 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-06-22 14:29:27,792 WARN ]: Spent 713.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2018-06-22 14:29:31,942 WARN ]: Spent 2.34 s on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2018-06-22 14:29:32,075 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:29:32,119 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:29:32,119 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:29:32,120 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:29:32,120 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:29:32,120 INFO ]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:29:32,121 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:29:32,781 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 Received shutdown request... [2018-06-22 14:29:33,773 WARN ]: Removed 13 from assertion stack [2018-06-22 14:29:33,773 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:29:33,773 WARN ]: Verification canceled [2018-06-22 14:29:33,777 WARN ]: Timeout [2018-06-22 14:29:33,777 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:29:33 BoogieIcfgContainer [2018-06-22 14:29:33,778 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:29:33,778 INFO ]: Toolchain (without parser) took 46187.63 ms. Allocated memory was 940.6 MB in the beginning and 1.6 GB in the end (delta: 646.4 MB). Free memory was 452.0 MB in the beginning and 1.2 GB in the end (delta: -702.8 MB). Peak memory consumption was 906.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:29:33,779 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:29:33,779 INFO ]: ChcToBoogie took 124.26 ms. Allocated memory is still 940.6 MB. Free memory was 452.0 MB in the beginning and 444.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:29:33,779 INFO ]: Boogie Preprocessor took 210.85 ms. Allocated memory is still 940.6 MB. Free memory was 444.8 MB in the beginning and 417.0 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 3.6 GB. [2018-06-22 14:29:33,780 INFO ]: RCFGBuilder took 7573.27 ms. Allocated memory was 940.6 MB in the beginning and 1.4 GB in the end (delta: 487.1 MB). Free memory was 417.0 MB in the beginning and 975.0 MB in the end (delta: -558.0 MB). Peak memory consumption was 692.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:29:33,780 INFO ]: TraceAbstraction took 38272.06 ms. Allocated memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: 159.4 MB). Free memory was 975.0 MB in the beginning and 1.2 GB in the end (delta: -179.8 MB). Peak memory consumption was 942.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:29:33,782 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 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 124.26 ms. Allocated memory is still 940.6 MB. Free memory was 452.0 MB in the beginning and 444.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 210.85 ms. Allocated memory is still 940.6 MB. Free memory was 444.8 MB in the beginning and 417.0 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 3.6 GB. * RCFGBuilder took 7573.27 ms. Allocated memory was 940.6 MB in the beginning and 1.4 GB in the end (delta: 487.1 MB). Free memory was 417.0 MB in the beginning and 975.0 MB in the end (delta: -558.0 MB). Peak memory consumption was 692.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 38272.06 ms. Allocated memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: 159.4 MB). Free memory was 975.0 MB in the beginning and 1.2 GB in the end (delta: -179.8 MB). Peak memory consumption was 942.6 MB. 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 (17states) and interpolant automaton (currently 7 states, 16 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 75. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 38.2s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 33 SDslu, 128 SDs, 0 SdLazy, 102 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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: 0.8s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 38392 SizeOfPredicates, 7814 NumberOfNonLiveVariables, 11010 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 22/68 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/token_ring.11.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-29-33-789.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.11.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-29-33-789.csv Completed graceful shutdown