java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:49:35,440 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:49:35,443 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:49:35,459 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:49:35,459 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:49:35,460 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:49:35,462 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:49:35,464 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:49:35,466 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:49:35,466 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:49:35,468 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:49:35,468 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:49:35,469 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:49:35,470 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:49:35,473 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:49:35,474 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:49:35,476 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:49:35,486 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:49:35,488 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:49:35,488 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:49:35,489 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:49:35,491 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:49:35,492 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:49:35,495 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:49:35,496 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:49:35,497 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:49:35,498 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:49:35,498 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:49:35,502 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:49:35,502 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:49:35,503 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:49:35,503 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:49:35,503 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:49:35,504 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:49:35,506 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:49:35,507 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:49:35,529 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:49:35,529 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:49:35,530 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:49:35,531 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:49:35,532 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:49:35,532 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:49:35,532 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:49:35,533 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:49:35,533 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:49:35,533 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:49:35,533 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:49:35,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:49:35,534 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:49:35,534 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:49:35,534 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:49:35,534 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:49:35,534 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:49:35,536 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:49:35,536 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:49:35,584 INFO ]: Repository-Root is: /tmp [2018-06-22 02:49:35,598 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:49:35,606 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:49:35,608 INFO ]: Initializing SmtParser... [2018-06-22 02:49:35,608 INFO ]: SmtParser initialized [2018-06-22 02:49:35,609 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-22 02:49:35,611 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 02:49:35,711 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 unknown [2018-06-22 02:49:35,960 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/misc/fourslot.smt2 [2018-06-22 02:49:35,965 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:49:35,973 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:49:35,974 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:49:35,974 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:49:35,974 INFO ]: ChcToBoogie initialized [2018-06-22 02:49:35,977 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:49:35" (1/1) ... [2018-06-22 02:49:36,053 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36 Unit [2018-06-22 02:49:36,053 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:49:36,054 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:49:36,054 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:49:36,054 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:49:36,076 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,077 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,092 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,092 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,107 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,109 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,110 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (1/1) ... [2018-06-22 02:49:36,112 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:49:36,112 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:49:36,112 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:49:36,112 INFO ]: RCFGBuilder initialized [2018-06-22 02:49:36,121 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (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 02:49:36,138 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:49:36,138 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:49:36,138 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:49:36,138 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:49:36,138 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:49:36,138 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 02:49:36,449 INFO ]: Using library mode [2018-06-22 02:49:36,449 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:49:36 BoogieIcfgContainer [2018-06-22 02:49:36,449 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:49:36,451 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:49:36,451 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:49:36,460 INFO ]: TraceAbstraction initialized [2018-06-22 02:49:36,460 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:49:35" (1/3) ... [2018-06-22 02:49:36,461 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180bd92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:49:36, skipping insertion in model container [2018-06-22 02:49:36,461 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:49:36" (2/3) ... [2018-06-22 02:49:36,462 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180bd92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:49:36, skipping insertion in model container [2018-06-22 02:49:36,462 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:49:36" (3/3) ... [2018-06-22 02:49:36,464 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:49:36,474 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:49:36,491 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:49:36,569 INFO ]: Using default assertion order modulation [2018-06-22 02:49:36,570 INFO ]: Interprodecural is true [2018-06-22 02:49:36,570 INFO ]: Hoare is false [2018-06-22 02:49:36,570 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:49:36,570 INFO ]: Backedges is TWOTRACK [2018-06-22 02:49:36,570 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:49:36,570 INFO ]: Difference is false [2018-06-22 02:49:36,570 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:49:36,570 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:49:36,584 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 02:49:36,595 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:49:36,596 INFO ]: Found error trace [2018-06-22 02:49:36,597 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:49:36,597 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:49:36,601 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 02:49:36,603 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:49:36,603 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:49:36,638 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:36,638 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:49:36,638 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:36,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:36,803 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:36,806 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:49:36,806 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:49:36,808 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:49:36,823 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:49:36,823 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:49:36,827 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 02:49:36,894 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:49:36,894 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 02:49:36,897 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:49:36,898 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:49:36,899 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:49:36,907 INFO ]: With dead ends: 9 [2018-06-22 02:49:36,908 INFO ]: Without dead ends: 9 [2018-06-22 02:49:36,912 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:49:36,931 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:49:36,945 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:49:36,946 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:49:36,947 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 02:49:36,948 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 02:49:36,948 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:49:36,948 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 02:49:36,948 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:49:36,948 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 02:49:36,948 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:49:36,949 INFO ]: Found error trace [2018-06-22 02:49:36,949 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:49:36,949 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:49:36,949 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 02:49:36,949 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:49:36,949 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:49:36,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:36,950 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:49:36,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:37,001 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:37,242 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-22 02:49:37,297 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:37,297 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:49:37,298 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 02:49:37,305 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:49:37,365 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:37,382 INFO ]: Computing forward predicates... [2018-06-22 02:49:37,975 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:37,997 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:49:37,997 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 02:49:37,998 INFO ]: Interpolant automaton has 6 states [2018-06-22 02:49:37,998 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 02:49:37,998 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 02:49:37,998 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 02:49:38,152 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:49:38,152 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 02:49:38,153 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 02:49:38,153 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 02:49:38,153 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:49:38,153 INFO ]: With dead ends: 11 [2018-06-22 02:49:38,153 INFO ]: Without dead ends: 11 [2018-06-22 02:49:38,154 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 02:49:38,154 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 02:49:38,155 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 02:49:38,155 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:49:38,156 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 02:49:38,156 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 02:49:38,156 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:49:38,156 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 02:49:38,156 INFO ]: Interpolant automaton has 6 states. [2018-06-22 02:49:38,156 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 02:49:38,156 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:49:38,156 INFO ]: Found error trace [2018-06-22 02:49:38,156 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:49:38,157 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:49:38,160 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 02:49:38,160 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:49:38,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:49:38,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:38,161 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:49:38,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:38,271 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:38,645 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-06-22 02:49:38,875 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2018-06-22 02:49:39,030 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:39,030 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:49:39,030 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 02:49:39,036 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:49:39,117 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:49:39,117 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:39,122 INFO ]: Computing forward predicates... [2018-06-22 02:49:39,831 WARN ]: Spent 429.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-06-22 02:49:40,623 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:40,645 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:49:40,645 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 02:49:40,645 INFO ]: Interpolant automaton has 10 states [2018-06-22 02:49:40,645 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 02:49:40,645 INFO ]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:49:40,646 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 02:49:40,717 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:49:40,717 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 02:49:40,717 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 02:49:40,717 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 02:49:40,717 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:49:40,717 INFO ]: With dead ends: 13 [2018-06-22 02:49:40,717 INFO ]: Without dead ends: 13 [2018-06-22 02:49:40,718 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:49:40,718 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 02:49:40,719 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 02:49:40,719 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 02:49:40,720 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 02:49:40,720 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 02:49:40,720 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:49:40,720 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 02:49:40,720 INFO ]: Interpolant automaton has 10 states. [2018-06-22 02:49:40,720 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 02:49:40,720 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 02:49:40,720 INFO ]: Found error trace [2018-06-22 02:49:40,720 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:49:40,721 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:49:40,721 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 02:49:40,721 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:49:40,721 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:49:40,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:40,722 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:49:40,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:49:40,879 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:41,376 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2018-06-22 02:49:41,548 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2018-06-22 02:49:42,018 WARN ]: Spent 428.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2018-06-22 02:49:42,177 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2018-06-22 02:49:42,346 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:49:42,346 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:49:42,346 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 02:49:42,352 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:49:42,416 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 02:49:42,417 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:49:42,426 INFO ]: Computing forward predicates... [2018-06-22 02:49:46,676 WARN ]: Spent 447.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 30 [2018-06-22 02:49:46,950 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 02:49:47,017 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 02:49:47,482 WARN ]: Simplifying disjunction of 59904 conjuctions. This might take some time... Received shutdown request... [2018-06-22 02:50:49,581 INFO ]: Timeout while computing interpolants [2018-06-22 02:50:49,784 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:50:49,784 WARN ]: Verification canceled [2018-06-22 02:50:49,790 WARN ]: Timeout [2018-06-22 02:50:49,790 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:50:49 BoogieIcfgContainer [2018-06-22 02:50:49,790 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:50:49,791 INFO ]: Toolchain (without parser) took 73825.31 ms. Allocated memory was 307.8 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 261.2 MB in the beginning and 625.8 MB in the end (delta: -364.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 02:50:49,795 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 307.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:50:49,796 INFO ]: ChcToBoogie took 79.75 ms. Allocated memory is still 307.8 MB. Free memory was 260.2 MB in the beginning and 258.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:50:49,796 INFO ]: Boogie Preprocessor took 58.09 ms. Allocated memory is still 307.8 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 02:50:49,796 INFO ]: RCFGBuilder took 336.95 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 244.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:50:49,797 INFO ]: TraceAbstraction took 73339.74 ms. Allocated memory was 307.8 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 244.2 MB in the beginning and 625.8 MB in the end (delta: -381.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 02:50:49,809 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 307.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 79.75 ms. Allocated memory is still 307.8 MB. Free memory was 260.2 MB in the beginning and 258.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.09 ms. Allocated memory is still 307.8 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 336.95 ms. Allocated memory is still 307.8 MB. Free memory was 256.2 MB in the beginning and 244.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 73339.74 ms. Allocated memory was 307.8 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 244.2 MB in the beginning and 625.8 MB in the end (delta: -381.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 59904 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 73.2s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 44 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1597 SizeOfPredicates, 4 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-50-49-835.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fourslot.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-50-49-835.csv Completed graceful shutdown