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/floppy_simpl4_BUG.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:03:35,488 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:03:35,491 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:03:35,501 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:03:35,501 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:03:35,502 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:03:35,503 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:03:35,505 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:03:35,507 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:03:35,507 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:03:35,508 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:03:35,509 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:03:35,509 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:03:35,513 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:03:35,513 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:03:35,514 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:03:35,516 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:03:35,527 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:03:35,529 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:03:35,530 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:03:35,531 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:03:35,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:03:35,533 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:03:35,534 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:03:35,534 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:03:35,535 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:03:35,540 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:03:35,541 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:03:35,542 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:03:35,542 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:03:35,543 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:03:35,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:03:35,549 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:03:35,550 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:03:35,551 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:03:35,551 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 14:03:35,573 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:03:35,573 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:03:35,574 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:03:35,574 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:03:35,575 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:03:35,575 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:03:35,575 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:03:35,576 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:03:35,576 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:03:35,576 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:03:35,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:03:35,576 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:03:35,576 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:03:35,577 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:03:35,577 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:03:35,578 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:03:35,578 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:03:35,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:03:35,578 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:03:35,580 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:03:35,580 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:03:35,624 INFO ]: Repository-Root is: /tmp [2018-06-22 14:03:35,646 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:03:35,651 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:03:35,653 INFO ]: Initializing SmtParser... [2018-06-22 14:03:35,653 INFO ]: SmtParser initialized [2018-06-22 14:03:35,654 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl4_BUG.cil.smt2 [2018-06-22 14:03:35,655 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 14:03:35,744 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl4_BUG.cil.smt2 unknown [2018-06-22 14:03:37,383 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/floppy_simpl4_BUG.cil.smt2 [2018-06-22 14:03:37,387 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:03:37,404 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:03:37,404 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:03:37,404 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:03:37,404 INFO ]: ChcToBoogie initialized [2018-06-22 14:03:37,407 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,526 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37 Unit [2018-06-22 14:03:37,526 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:03:37,526 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:03:37,526 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:03:37,527 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:03:37,550 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,550 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,582 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,582 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,616 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,618 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,628 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (1/1) ... [2018-06-22 14:03:37,638 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:03:37,638 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:03:37,638 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:03:37,639 INFO ]: RCFGBuilder initialized [2018-06-22 14:03:37,639 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (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 14:03:37,649 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:03:37,649 INFO ]: Found specification of procedure False [2018-06-22 14:03:37,649 INFO ]: Found implementation of procedure False [2018-06-22 14:03:37,649 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:03:37,650 INFO ]: Found specification of procedure state [2018-06-22 14:03:37,650 INFO ]: Found implementation of procedure state [2018-06-22 14:03:37,650 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:03:37,650 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:03:37,650 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 14:03:38,654 INFO ]: Using library mode [2018-06-22 14:03:38,654 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:03:38 BoogieIcfgContainer [2018-06-22 14:03:38,654 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:03:38,656 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:03:38,656 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:03:38,662 INFO ]: TraceAbstraction initialized [2018-06-22 14:03:38,662 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:03:37" (1/3) ... [2018-06-22 14:03:38,663 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701c714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:03:38, skipping insertion in model container [2018-06-22 14:03:38,663 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:03:37" (2/3) ... [2018-06-22 14:03:38,663 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701c714a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:03:38, skipping insertion in model container [2018-06-22 14:03:38,663 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:03:38" (3/3) ... [2018-06-22 14:03:38,666 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:03:38,675 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:03:38,688 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:03:38,741 INFO ]: Using default assertion order modulation [2018-06-22 14:03:38,742 INFO ]: Interprodecural is true [2018-06-22 14:03:38,742 INFO ]: Hoare is false [2018-06-22 14:03:38,742 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:03:38,742 INFO ]: Backedges is TWOTRACK [2018-06-22 14:03:38,742 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:03:38,742 INFO ]: Difference is false [2018-06-22 14:03:38,742 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:03:38,742 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:03:38,758 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:03:38,773 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:03:38,773 INFO ]: Found error trace [2018-06-22 14:03:38,774 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:03:38,775 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:03:38,782 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:03:38,784 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:03:38,784 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:03:38,833 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:38,833 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:03:38,833 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:38,893 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:39,110 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:03:39,113 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:03:39,113 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:03:39,115 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:03:39,131 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:03:39,131 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:03:39,134 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:03:39,403 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:03:39,403 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:03:39,405 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:03:39,406 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:03:39,406 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:03:39,420 INFO ]: With dead ends: 13 [2018-06-22 14:03:39,420 INFO ]: Without dead ends: 13 [2018-06-22 14:03:39,422 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 14:03:39,440 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:03:39,475 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:03:39,476 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:03:39,476 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:03:39,478 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:03:39,478 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:03:39,478 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:03:39,478 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:03:39,478 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:03:39,479 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:03:39,479 INFO ]: Found error trace [2018-06-22 14:03:39,480 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:03:39,480 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:03:39,480 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:03:39,480 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:03:39,480 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:03:39,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:39,481 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:03:39,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:39,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:40,333 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:03:40,653 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:03:40,658 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:03:40,658 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:03:40,658 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 14:03:40,676 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:03:40,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:40,960 INFO ]: Computing forward predicates... [2018-06-22 14:03:43,405 WARN ]: Spent 781.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2018-06-22 14:03:43,609 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:03:43,633 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:03:43,633 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:03:43,633 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:03:43,633 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:03:43,634 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:03:43,634 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:03:44,024 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2018-06-22 14:03:44,052 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:03:44,052 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:03:44,053 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:03:44,053 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:03:44,053 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:03:44,053 INFO ]: With dead ends: 15 [2018-06-22 14:03:44,053 INFO ]: Without dead ends: 15 [2018-06-22 14:03:44,054 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:03:44,054 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:03:44,057 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:03:44,057 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:03:44,058 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:03:44,058 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:03:44,058 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:03:44,058 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:03:44,058 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:03:44,058 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:03:44,058 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:03:44,058 INFO ]: Found error trace [2018-06-22 14:03:44,058 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:03:44,058 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:03:44,059 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:03:44,059 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:03:44,059 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:03:44,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:44,059 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:03:44,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:44,591 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:45,441 WARN ]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:03:45,729 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 14:03:45,901 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2018-06-22 14:03:46,085 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:03:46,085 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:03:46,085 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) [2018-06-22 14:03:46,100 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:03:46,438 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:03:46,438 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:46,467 INFO ]: Computing forward predicates... [2018-06-22 14:03:48,301 WARN ]: Spent 713.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2018-06-22 14:03:54,015 WARN ]: Spent 1.45 s on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2018-06-22 14:03:54,328 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:03:54,366 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:03:54,366 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:03:54,366 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:03:54,366 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:03:54,367 INFO ]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:03:54,367 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:03:54,987 WARN ]: Spent 385.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2018-06-22 14:03:55,461 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2018-06-22 14:03:55,641 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:03:55,641 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:03:55,641 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:03:55,641 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:03:55,642 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:03:55,642 INFO ]: With dead ends: 17 [2018-06-22 14:03:55,642 INFO ]: Without dead ends: 17 [2018-06-22 14:03:55,643 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:03:55,643 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:03:55,645 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:03:55,645 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:03:55,646 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:03:55,646 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:03:55,646 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:03:55,646 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:03:55,646 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:03:55,646 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:03:55,647 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:03:55,647 INFO ]: Found error trace [2018-06-22 14:03:55,647 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:03:55,647 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:03:55,647 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:03:55,647 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:03:55,647 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:03:55,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:55,650 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:03:55,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:03:56,442 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:03:57,358 WARN ]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:03:57,730 WARN ]: Spent 319.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2018-06-22 14:03:59,864 WARN ]: Spent 2.10 s on a formula simplification. DAG size of input: 237 DAG size of output: 127 [2018-06-22 14:04:00,536 WARN ]: Spent 622.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 72 [2018-06-22 14:04:01,121 WARN ]: Spent 540.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 62 [2018-06-22 14:04:01,254 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:04:01,254 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:04:01,254 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 14:04:01,271 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:04:01,838 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:04:01,838 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:01,870 INFO ]: Computing forward predicates... [2018-06-22 14:04:03,437 WARN ]: Spent 598.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2018-06-22 14:04:16,672 WARN ]: Spent 4.50 s on a formula simplification. DAG size of input: 213 DAG size of output: 156 Received shutdown request... [2018-06-22 14:04:34,014 INFO ]: Timeout while computing interpolants [2018-06-22 14:04:34,215 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:04:34,215 WARN ]: Verification canceled [2018-06-22 14:04:34,218 WARN ]: Timeout [2018-06-22 14:04:34,219 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:04:34 BoogieIcfgContainer [2018-06-22 14:04:34,219 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:04:34,219 INFO ]: Toolchain (without parser) took 56831.70 ms. Allocated memory was 336.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 216.0 MB in the beginning and 1.0 GB in the end (delta: -810.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:04:34,220 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:04:34,220 INFO ]: ChcToBoogie took 121.85 ms. Allocated memory is still 336.6 MB. Free memory was 216.0 MB in the beginning and 211.1 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:04:34,221 INFO ]: Boogie Preprocessor took 111.55 ms. Allocated memory is still 336.6 MB. Free memory was 211.1 MB in the beginning and 206.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:04:34,221 INFO ]: RCFGBuilder took 1015.98 ms. Allocated memory was 336.6 MB in the beginning and 377.5 MB in the end (delta: 40.9 MB). Free memory was 206.2 MB in the beginning and 219.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:04:34,221 INFO ]: TraceAbstraction took 55562.85 ms. Allocated memory was 377.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 219.4 MB in the beginning and 1.0 GB in the end (delta: -807.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 14:04:34,223 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 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 121.85 ms. Allocated memory is still 336.6 MB. Free memory was 216.0 MB in the beginning and 211.1 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 111.55 ms. Allocated memory is still 336.6 MB. Free memory was 211.1 MB in the beginning and 206.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1015.98 ms. Allocated memory was 336.6 MB in the beginning and 377.5 MB in the end (delta: 40.9 MB). Free memory was 206.2 MB in the beginning and 219.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 55562.85 ms. Allocated memory was 377.5 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 219.4 MB in the beginning and 1.0 GB in the end (delta: -807.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 3320 quantified variables from 67 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 55.4s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 19 SDslu, 79 SDs, 0 SdLazy, 56 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 6.4s 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: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 21196 SizeOfPredicates, 1905 NumberOfNonLiveVariables, 1104 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 9/26 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/floppy_simpl4_BUG.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-04-34-234.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/floppy_simpl4_BUG.cil.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-04-34-234.csv Completed graceful shutdown