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/lustre/metros_3_e4_1251.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:16:36,972 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:16:36,975 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:16:36,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:16:36,987 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:16:36,988 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:16:36,989 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:16:36,994 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:16:36,995 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:16:36,997 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:16:36,998 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:16:36,998 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:16:36,999 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:16:37,000 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:16:37,001 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:16:37,004 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:16:37,006 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:16:37,017 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:16:37,019 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:16:37,020 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:16:37,021 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:16:37,023 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:16:37,024 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:16:37,024 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:16:37,025 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:16:37,029 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:16:37,030 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:16:37,031 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:16:37,032 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:16:37,032 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:16:37,033 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:16:37,033 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:16:37,034 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:16:37,034 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:16:37,035 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:16:37,035 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 19:16:37,060 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:16:37,061 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:16:37,061 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:16:37,061 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:16:37,062 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:16:37,062 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:16:37,063 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:16:37,063 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:16:37,063 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:16:37,063 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:16:37,063 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:16:37,064 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:16:37,064 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:16:37,064 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:16:37,064 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:16:37,064 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:16:37,064 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:16:37,065 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:16:37,065 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:16:37,070 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:16:37,070 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:16:37,115 INFO ]: Repository-Root is: /tmp [2018-06-22 19:16:37,128 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:16:37,134 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:16:37,136 INFO ]: Initializing SmtParser... [2018-06-22 19:16:37,136 INFO ]: SmtParser initialized [2018-06-22 19:16:37,137 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_1251.smt2 [2018-06-22 19:16:37,138 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 19:16:37,228 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_1251.smt2 unknown [2018-06-22 19:16:37,653 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e4_1251.smt2 [2018-06-22 19:16:37,662 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:16:37,668 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:16:37,669 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:16:37,669 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:16:37,671 INFO ]: ChcToBoogie initialized [2018-06-22 19:16:37,674 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,737 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37 Unit [2018-06-22 19:16:37,737 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:16:37,738 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:16:37,738 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:16:37,738 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:16:37,764 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,764 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,773 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,773 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,779 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,784 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,786 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (1/1) ... [2018-06-22 19:16:37,789 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:16:37,789 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:16:37,789 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:16:37,789 INFO ]: RCFGBuilder initialized [2018-06-22 19:16:37,790 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (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 19:16:37,802 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:16:37,802 INFO ]: Found specification of procedure False [2018-06-22 19:16:37,802 INFO ]: Found implementation of procedure False [2018-06-22 19:16:37,802 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:16:37,802 INFO ]: Found specification of procedure state [2018-06-22 19:16:37,802 INFO ]: Found implementation of procedure state [2018-06-22 19:16:37,802 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:16:37,802 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:16:37,802 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 19:16:38,199 INFO ]: Using library mode [2018-06-22 19:16:38,200 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:16:38 BoogieIcfgContainer [2018-06-22 19:16:38,200 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:16:38,202 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:16:38,202 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:16:38,205 INFO ]: TraceAbstraction initialized [2018-06-22 19:16:38,205 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:16:37" (1/3) ... [2018-06-22 19:16:38,206 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac89815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:16:38, skipping insertion in model container [2018-06-22 19:16:38,206 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:16:37" (2/3) ... [2018-06-22 19:16:38,206 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac89815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:16:38, skipping insertion in model container [2018-06-22 19:16:38,206 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:16:38" (3/3) ... [2018-06-22 19:16:38,208 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:16:38,217 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:16:38,227 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:16:38,263 INFO ]: Using default assertion order modulation [2018-06-22 19:16:38,264 INFO ]: Interprodecural is true [2018-06-22 19:16:38,264 INFO ]: Hoare is false [2018-06-22 19:16:38,264 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:16:38,264 INFO ]: Backedges is TWOTRACK [2018-06-22 19:16:38,264 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:16:38,264 INFO ]: Difference is false [2018-06-22 19:16:38,264 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:16:38,264 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:16:38,276 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:16:38,289 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:16:38,289 INFO ]: Found error trace [2018-06-22 19:16:38,290 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:38,290 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:38,296 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:16:38,298 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:38,298 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:38,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:38,332 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:16:38,332 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:38,436 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:38,633 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:16:38,634 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:16:38,635 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:16:38,636 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:16:38,646 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:16:38,646 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:16:38,648 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:16:38,787 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:16:38,787 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:16:38,787 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:16:38,789 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:16:38,789 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:16:38,799 INFO ]: With dead ends: 13 [2018-06-22 19:16:38,799 INFO ]: Without dead ends: 13 [2018-06-22 19:16:38,801 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 19:16:38,813 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:16:38,836 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:16:38,837 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:16:38,837 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:16:38,839 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:16:38,839 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:16:38,839 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:16:38,839 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:16:38,839 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:16:38,841 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:16:38,841 INFO ]: Found error trace [2018-06-22 19:16:38,841 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:38,841 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:38,841 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:16:38,841 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:38,841 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:38,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:38,842 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:16:38,842 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:38,929 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:39,315 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:16:39,392 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:16:39,392 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:16:39,392 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 19:16:39,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:16:39,532 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:39,544 INFO ]: Computing forward predicates... [2018-06-22 19:16:39,933 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:16:40,332 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:16:40,353 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:16:40,353 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:16:40,353 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:16:40,353 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:16:40,353 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:16:40,354 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:16:40,728 WARN ]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 19:16:41,050 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:16:41,050 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:16:41,051 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:16:41,051 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:16:41,051 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:16:41,052 INFO ]: With dead ends: 15 [2018-06-22 19:16:41,052 INFO ]: Without dead ends: 15 [2018-06-22 19:16:41,053 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:16:41,053 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:16:41,055 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:16:41,055 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:16:41,056 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:16:41,056 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:16:41,056 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:16:41,056 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:16:41,056 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:16:41,056 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:16:41,057 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:16:41,057 INFO ]: Found error trace [2018-06-22 19:16:41,057 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:41,057 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:41,057 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:16:41,057 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:41,057 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:41,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:41,058 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:16:41,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:41,156 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:41,477 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:16:41,477 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:16:41,477 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 19:16:41,491 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:16:41,624 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:16:41,624 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:41,630 INFO ]: Computing forward predicates... [2018-06-22 19:16:42,225 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:16:42,245 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:16:42,245 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:16:42,246 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:16:42,246 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:16:42,246 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:16:42,246 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:16:42,560 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:16:42,560 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:16:42,561 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:16:42,561 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:16:42,561 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:16:42,562 INFO ]: With dead ends: 19 [2018-06-22 19:16:42,562 INFO ]: Without dead ends: 19 [2018-06-22 19:16:42,562 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 19:16:42,562 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:16:42,565 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:16:42,566 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:16:42,566 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:16:42,566 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 19:16:42,566 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:16:42,566 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:16:42,566 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:16:42,566 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:16:42,567 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:16:42,567 INFO ]: Found error trace [2018-06-22 19:16:42,567 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:42,567 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:42,567 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 3 times [2018-06-22 19:16:42,567 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:42,567 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:42,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:42,568 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:16:42,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:42,874 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:43,360 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:16:43,767 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-06-22 19:16:44,155 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2018-06-22 19:16:44,213 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:16:44,213 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:16:44,213 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 19:16:44,229 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:16:44,433 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 19:16:44,433 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:44,440 INFO ]: Computing forward predicates... [2018-06-22 19:16:44,819 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:16:44,841 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:16:44,841 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 19:16:44,841 INFO ]: Interpolant automaton has 21 states [2018-06-22 19:16:44,841 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 19:16:44,841 INFO ]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:16:44,841 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 19:16:45,004 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2018-06-22 19:16:45,278 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2018-06-22 19:16:45,562 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2018-06-22 19:16:45,692 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-06-22 19:16:45,930 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2018-06-22 19:16:45,979 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:16:45,979 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:16:45,981 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:16:45,981 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 19:16:45,981 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:16:45,981 INFO ]: With dead ends: 21 [2018-06-22 19:16:45,981 INFO ]: Without dead ends: 21 [2018-06-22 19:16:45,982 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2018-06-22 19:16:45,982 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:16:45,985 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:16:45,985 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:16:45,986 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:16:45,986 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:16:45,986 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:16:45,986 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:16:45,986 INFO ]: Interpolant automaton has 21 states. [2018-06-22 19:16:45,986 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:16:45,987 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:16:45,987 INFO ]: Found error trace [2018-06-22 19:16:45,987 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:45,987 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:45,987 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 4 times [2018-06-22 19:16:45,987 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:45,987 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:45,988 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:45,988 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:16:45,988 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:46,177 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:46,966 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:16:48,269 WARN ]: Spent 1.22 s on a formula simplification. DAG size of input: 105 DAG size of output: 34 [2018-06-22 19:16:48,804 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 56 [2018-06-22 19:16:49,267 WARN ]: Spent 430.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2018-06-22 19:16:49,844 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 64 [2018-06-22 19:16:50,223 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 24 [2018-06-22 19:16:50,864 WARN ]: Spent 384.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 51 [2018-06-22 19:16:51,467 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 55 [2018-06-22 19:16:51,704 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 8 [2018-06-22 19:16:51,728 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:16:51,728 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:16:51,728 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:16:51,743 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:16:51,911 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:16:51,911 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:16:51,919 INFO ]: Computing forward predicates... [2018-06-22 19:16:52,420 INFO ]: Checked inductivity of 55 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-22 19:16:52,441 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:16:52,441 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2018-06-22 19:16:52,441 INFO ]: Interpolant automaton has 23 states [2018-06-22 19:16:52,441 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 19:16:52,441 INFO ]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2018-06-22 19:16:52,441 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 19:16:52,839 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 156 [2018-06-22 19:16:53,528 WARN ]: Spent 601.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 196 [2018-06-22 19:16:54,044 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 214 [2018-06-22 19:16:54,477 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 190 [2018-06-22 19:16:54,991 WARN ]: Spent 456.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2018-06-22 19:16:55,426 WARN ]: Spent 376.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 191 [2018-06-22 19:16:55,885 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 154 [2018-06-22 19:16:56,242 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 151 [2018-06-22 19:16:56,510 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:16:56,510 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 19:16:56,511 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 19:16:56,511 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 19:16:56,512 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:16:56,512 INFO ]: With dead ends: 27 [2018-06-22 19:16:56,512 INFO ]: Without dead ends: 27 [2018-06-22 19:16:56,513 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2018-06-22 19:16:56,513 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 19:16:56,516 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 19:16:56,517 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 19:16:56,517 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 19:16:56,517 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 29 [2018-06-22 19:16:56,518 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:16:56,518 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 19:16:56,518 INFO ]: Interpolant automaton has 23 states. [2018-06-22 19:16:56,518 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 19:16:56,519 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 19:16:56,519 INFO ]: Found error trace [2018-06-22 19:16:56,519 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:16:56,519 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:16:56,519 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 5 times [2018-06-22 19:16:56,519 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:16:56,519 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:16:56,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:16:56,520 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:16:56,520 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:17:01,605 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 19:17:32,483 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:32,530 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:32,877 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:32,918 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:32,919 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:32,919 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:33,606 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:34,100 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:34,677 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:35,146 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:36,573 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:36,919 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:17:37,191 WARN ]: Unable to check validity of interpolant: cancelled Cannot interrupt operation gracefully because timeout expired. Forcing shutdown