java -Xss1g -Xmx8000000000 -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-comp18-benchmarks/lra/chc-lra-0085.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4413abc-m [2018-06-20 14:14:44,034 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-20 14:14:44,048 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-20 14:14:44,062 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-20 14:14:44,062 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-20 14:14:44,063 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-20 14:14:44,064 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-20 14:14:44,067 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-20 14:14:44,068 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-20 14:14:44,070 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-20 14:14:44,071 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-20 14:14:44,071 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-20 14:14:44,072 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-20 14:14:44,073 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-20 14:14:44,073 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-20 14:14:44,076 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-20 14:14:44,078 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-20 14:14:44,088 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-20 14:14:44,092 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-20 14:14:44,093 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-20 14:14:44,094 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-20 14:14:44,097 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-20 14:14:44,097 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-20 14:14:44,097 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-20 14:14:44,098 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-20 14:14:44,102 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-20 14:14:44,103 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-20 14:14:44,103 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-20 14:14:44,104 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-20 14:14:44,105 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-20 14:14:44,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-20 14:14:44,109 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-20 14:14:44,109 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-20 14:14:44,110 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-20 14:14:44,111 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-20 14:14:44,111 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-20 14:14:44,132 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-20 14:14:44,133 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-20 14:14:44,133 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-20 14:14:44,133 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-20 14:14:44,134 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-20 14:14:44,134 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-20 14:14:44,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-20 14:14:44,135 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-20 14:14:44,135 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-20 14:14:44,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-20 14:14:44,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-20 14:14:44,135 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-20 14:14:44,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-20 14:14:44,137 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-20 14:14:44,138 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-20 14:14:44,138 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-20 14:14:44,185 INFO ]: Repository-Root is: /tmp [2018-06-20 14:14:44,202 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-20 14:14:44,208 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-20 14:14:44,210 INFO ]: Initializing SmtParser... [2018-06-20 14:14:44,210 INFO ]: SmtParser initialized [2018-06-20 14:14:44,211 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp18-benchmarks/lra/chc-lra-0085.smt2 [2018-06-20 14:14:44,212 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 [2018-06-20 14:14:44,299 INFO ]: Executing SMT file /storage/chc-comp18-benchmarks/lra/chc-lra-0085.smt2 unknown [2018-06-20 14:14:44,823 INFO ]: Succesfully executed SMT file /storage/chc-comp18-benchmarks/lra/chc-lra-0085.smt2 [2018-06-20 14:14:44,827 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-20 14:14:44,832 INFO ]: Walking toolchain with 4 elements. [2018-06-20 14:14:44,833 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-20 14:14:44,833 INFO ]: Initializing ChcToBoogie... [2018-06-20 14:14:44,833 INFO ]: ChcToBoogie initialized [2018-06-20 14:14:44,836 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 20.06 02:14:44" (1/1) ... [2018-06-20 14:14:45,299 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45 Unit [2018-06-20 14:14:45,300 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-20 14:14:45,300 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-20 14:14:45,300 INFO ]: Initializing Boogie Preprocessor... [2018-06-20 14:14:45,300 INFO ]: Boogie Preprocessor initialized [2018-06-20 14:14:45,323 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,323 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,361 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,361 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,418 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,419 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,434 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (1/1) ... [2018-06-20 14:14:45,452 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-20 14:14:45,453 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-20 14:14:45,453 INFO ]: Initializing RCFGBuilder... [2018-06-20 14:14:45,453 INFO ]: RCFGBuilder initialized [2018-06-20 14:14:45,456 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (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) [2018-06-20 14:14:45,470 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-20 14:14:45,470 INFO ]: Found specification of procedure False [2018-06-20 14:14:45,470 INFO ]: Found implementation of procedure False [2018-06-20 14:14:45,470 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-20 14:14:45,470 INFO ]: Found specification of procedure state [2018-06-20 14:14:45,470 INFO ]: Found implementation of procedure state [2018-06-20 14:14:45,471 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-20 14:14:45,471 INFO ]: Found specification of procedure Ultimate.START [2018-06-20 14:14:45,471 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 [2018-06-20 14:14:46,518 INFO ]: Using library mode [2018-06-20 14:14:46,518 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 02:14:46 BoogieIcfgContainer [2018-06-20 14:14:46,518 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-20 14:14:46,520 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-20 14:14:46,520 INFO ]: Initializing TraceAbstraction... [2018-06-20 14:14:46,523 INFO ]: TraceAbstraction initialized [2018-06-20 14:14:46,523 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 20.06 02:14:44" (1/3) ... [2018-06-20 14:14:46,524 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb5d5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 20.06 02:14:46, skipping insertion in model container [2018-06-20 14:14:46,524 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 20.06 02:14:45" (2/3) ... [2018-06-20 14:14:46,525 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb5d5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 02:14:46, skipping insertion in model container [2018-06-20 14:14:46,525 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 02:14:46" (3/3) ... [2018-06-20 14:14:46,527 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-20 14:14:46,537 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-20 14:14:46,588 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-20 14:14:46,639 INFO ]: Using default assertion order modulation [2018-06-20 14:14:46,639 INFO ]: Interprodecural is true [2018-06-20 14:14:46,639 INFO ]: Hoare is false [2018-06-20 14:14:46,639 INFO ]: Compute interpolants for FPandBP [2018-06-20 14:14:46,639 INFO ]: Backedges is TWOTRACK [2018-06-20 14:14:46,639 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-20 14:14:46,639 INFO ]: Difference is false [2018-06-20 14:14:46,639 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-20 14:14:46,640 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-20 14:14:46,666 INFO ]: Start isEmpty. Operand 13 states. [2018-06-20 14:14:46,680 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-20 14:14:46,680 INFO ]: Found error trace [2018-06-20 14:14:46,687 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:14:46,687 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:14:46,692 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-20 14:14:46,695 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:14:46,695 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:14:46,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:46,741 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-20 14:14:46,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:46,787 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:46,981 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-20 14:14:46,984 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-20 14:14:46,984 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-20 14:14:46,986 INFO ]: Interpolant automaton has 4 states [2018-06-20 14:14:47,003 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-20 14:14:47,003 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-20 14:14:47,005 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-20 14:14:47,135 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:14:47,135 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-20 14:14:47,136 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-20 14:14:47,137 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-20 14:14:47,138 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:14:47,148 INFO ]: With dead ends: 13 [2018-06-20 14:14:47,148 INFO ]: Without dead ends: 13 [2018-06-20 14:14:47,150 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 [2018-06-20 14:14:47,167 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-20 14:14:47,188 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-20 14:14:47,189 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-20 14:14:47,190 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-20 14:14:47,191 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-20 14:14:47,191 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:14:47,191 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-20 14:14:47,191 INFO ]: Interpolant automaton has 4 states. [2018-06-20 14:14:47,191 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-20 14:14:47,192 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-20 14:14:47,193 INFO ]: Found error trace [2018-06-20 14:14:47,193 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:14:47,193 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:14:47,193 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-20 14:14:47,193 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:14:47,193 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:14:47,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:47,194 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-20 14:14:47,194 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:47,356 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:47,611 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-20 14:14:47,611 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:14:47,611 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 [2018-06-20 14:14:47,619 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-20 14:14:47,748 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:47,764 INFO ]: Computing forward predicates... [2018-06-20 14:14:49,021 WARN ]: Spent 716.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-20 14:14:49,358 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-20 14:14:49,394 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-20 14:14:49,394 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-20 14:14:49,394 INFO ]: Interpolant automaton has 8 states [2018-06-20 14:14:49,395 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-20 14:14:49,395 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-20 14:14:49,395 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-20 14:14:50,095 WARN ]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-20 14:14:50,352 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 5 [2018-06-20 14:14:50,448 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:14:50,448 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-20 14:14:50,449 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-20 14:14:50,449 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-20 14:14:50,449 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:14:50,449 INFO ]: With dead ends: 15 [2018-06-20 14:14:50,449 INFO ]: Without dead ends: 15 [2018-06-20 14:14:50,450 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-20 14:14:50,450 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-20 14:14:50,453 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-20 14:14:50,453 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-20 14:14:50,453 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-20 14:14:50,453 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-20 14:14:50,453 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:14:50,453 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-20 14:14:50,453 INFO ]: Interpolant automaton has 8 states. [2018-06-20 14:14:50,453 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-20 14:14:50,454 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-20 14:14:50,454 INFO ]: Found error trace [2018-06-20 14:14:50,454 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:14:50,454 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:14:50,454 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-20 14:14:50,454 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:14:50,454 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:14:50,455 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:50,455 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-20 14:14:50,455 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:50,535 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:50,809 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-20 14:14:50,809 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:14:50,809 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 [2018-06-20 14:14:50,826 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-20 14:14:50,927 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-20 14:14:50,928 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:50,935 INFO ]: Computing forward predicates... [2018-06-20 14:14:51,884 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-20 14:14:52,018 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-20 14:14:52,038 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-20 14:14:52,038 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-20 14:14:52,038 INFO ]: Interpolant automaton has 12 states [2018-06-20 14:14:52,038 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-20 14:14:52,039 INFO ]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-20 14:14:52,039 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-20 14:14:52,245 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-06-20 14:14:52,485 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:14:52,485 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-20 14:14:52,485 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-20 14:14:52,485 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-20 14:14:52,485 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:14:52,486 INFO ]: With dead ends: 17 [2018-06-20 14:14:52,486 INFO ]: Without dead ends: 17 [2018-06-20 14:14:52,486 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-20 14:14:52,486 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-20 14:14:52,489 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-20 14:14:52,489 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-20 14:14:52,489 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-20 14:14:52,489 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-20 14:14:52,490 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:14:52,490 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-20 14:14:52,490 INFO ]: Interpolant automaton has 12 states. [2018-06-20 14:14:52,490 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-20 14:14:52,491 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-20 14:14:52,491 INFO ]: Found error trace [2018-06-20 14:14:52,491 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:14:52,491 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:14:52,491 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-20 14:14:52,491 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:14:52,491 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:14:52,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:52,492 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-20 14:14:52,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:14:52,586 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:52,863 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-20 14:14:52,863 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:14:52,863 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 [2018-06-20 14:14:52,875 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-20 14:14:53,007 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-20 14:14:53,007 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:14:53,018 INFO ]: Computing forward predicates... [2018-06-20 14:14:56,743 WARN ]: Spent 2.80 s on a formula simplification. DAG size of input: 225 DAG size of output: 113 [2018-06-20 14:14:57,425 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 24 [2018-06-20 14:14:58,207 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-20 14:14:58,242 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-20 14:14:58,242 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-20 14:14:58,242 INFO ]: Interpolant automaton has 16 states [2018-06-20 14:14:58,243 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-20 14:14:58,243 INFO ]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-06-20 14:14:58,243 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-20 14:14:59,040 WARN ]: Spent 560.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2018-06-20 14:14:59,439 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 120 [2018-06-20 14:14:59,907 WARN ]: Spent 440.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 122 [2018-06-20 14:15:00,415 WARN ]: Spent 476.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2018-06-20 14:15:00,445 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:15:00,445 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-20 14:15:00,446 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-20 14:15:00,446 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-20 14:15:00,446 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:15:00,446 INFO ]: With dead ends: 19 [2018-06-20 14:15:00,446 INFO ]: Without dead ends: 19 [2018-06-20 14:15:00,447 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-06-20 14:15:00,447 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-20 14:15:00,448 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-20 14:15:00,448 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-20 14:15:00,451 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-20 14:15:00,451 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-20 14:15:00,451 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:15:00,451 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-20 14:15:00,451 INFO ]: Interpolant automaton has 16 states. [2018-06-20 14:15:00,451 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-20 14:15:00,452 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-20 14:15:00,452 INFO ]: Found error trace [2018-06-20 14:15:00,452 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:15:00,452 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:15:00,452 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-20 14:15:00,452 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:15:00,452 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:15:00,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:00,453 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-20 14:15:00,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:00,646 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:01,254 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-20 14:15:01,334 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-20 14:15:01,334 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:15:01,335 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 [2018-06-20 14:15:01,341 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-20 14:15:01,552 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-20 14:15:01,552 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:01,572 INFO ]: Computing forward predicates... [2018-06-20 14:15:02,359 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2018-06-20 14:15:02,616 INFO ]: Checked inductivity of 36 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-20 14:15:02,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-20 14:15:02,638 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-20 14:15:02,638 INFO ]: Interpolant automaton has 19 states [2018-06-20 14:15:02,638 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-20 14:15:02,638 INFO ]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-06-20 14:15:02,639 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-20 14:15:02,957 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2018-06-20 14:15:03,223 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2018-06-20 14:15:03,354 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2018-06-20 14:15:03,596 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2018-06-20 14:15:03,664 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:15:03,665 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-20 14:15:03,667 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-20 14:15:03,667 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-20 14:15:03,667 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:15:03,668 INFO ]: With dead ends: 21 [2018-06-20 14:15:03,668 INFO ]: Without dead ends: 21 [2018-06-20 14:15:03,668 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2018-06-20 14:15:03,668 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-20 14:15:03,671 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-20 14:15:03,671 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-20 14:15:03,672 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-20 14:15:03,672 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-20 14:15:03,672 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:15:03,672 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-20 14:15:03,672 INFO ]: Interpolant automaton has 19 states. [2018-06-20 14:15:03,672 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-20 14:15:03,673 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-20 14:15:03,673 INFO ]: Found error trace [2018-06-20 14:15:03,673 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:15:03,673 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:15:03,673 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-20 14:15:03,673 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:15:03,673 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:15:03,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:03,674 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-20 14:15:03,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:03,884 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:04,295 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2018-06-20 14:15:04,408 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-06-20 14:15:04,655 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-06-20 14:15:04,679 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-20 14:15:04,679 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:15:04,679 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-20 14:15:04,686 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-20 14:15:04,883 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-20 14:15:04,883 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:04,897 INFO ]: Computing forward predicates... [2018-06-20 14:15:07,594 WARN ]: Spent 2.16 s on a formula simplification. DAG size of input: 299 DAG size of output: 112 [2018-06-20 14:15:13,225 WARN ]: Spent 4.94 s on a formula simplification. DAG size of input: 358 DAG size of output: 201 [2018-06-20 14:15:22,118 WARN ]: Spent 8.00 s on a formula simplification. DAG size of input: 507 DAG size of output: 203 [2018-06-20 14:15:29,459 WARN ]: Spent 6.62 s on a formula simplification. DAG size of input: 430 DAG size of output: 205 [2018-06-20 14:15:30,104 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2018-06-20 14:15:30,407 INFO ]: Checked inductivity of 55 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-20 14:15:30,428 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-20 14:15:30,428 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-20 14:15:30,428 INFO ]: Interpolant automaton has 24 states [2018-06-20 14:15:30,428 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-20 14:15:30,428 INFO ]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2018-06-20 14:15:30,429 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-20 14:15:33,004 WARN ]: Spent 2.50 s on a formula simplification. DAG size of input: 279 DAG size of output: 212 [2018-06-20 14:15:33,533 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 40 [2018-06-20 14:15:34,281 WARN ]: Spent 567.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 40 [2018-06-20 14:15:34,982 WARN ]: Spent 621.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 48 [2018-06-20 14:15:35,665 WARN ]: Spent 597.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 54 [2018-06-20 14:15:37,815 WARN ]: Spent 2.02 s on a formula simplification. DAG size of input: 279 DAG size of output: 200 [2018-06-20 14:15:40,264 WARN ]: Spent 2.23 s on a formula simplification. DAG size of input: 279 DAG size of output: 206 [2018-06-20 14:15:40,333 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-20 14:15:40,333 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-20 14:15:40,334 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-20 14:15:40,334 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-20 14:15:40,334 INFO ]: Finished accepts. some prefix is accepted. [2018-06-20 14:15:40,334 INFO ]: With dead ends: 25 [2018-06-20 14:15:40,334 INFO ]: Without dead ends: 25 [2018-06-20 14:15:40,335 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-06-20 14:15:40,335 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-20 14:15:40,338 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-20 14:15:40,338 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-20 14:15:40,339 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-20 14:15:40,339 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-20 14:15:40,339 INFO ]: Finished accepts. word is rejected. [2018-06-20 14:15:40,339 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-20 14:15:40,339 INFO ]: Interpolant automaton has 24 states. [2018-06-20 14:15:40,340 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-20 14:15:40,341 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-20 14:15:40,341 INFO ]: Found error trace [2018-06-20 14:15:40,341 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-20 14:15:40,341 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-20 14:15:40,342 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 6 times [2018-06-20 14:15:40,342 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-20 14:15:40,342 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-20 14:15:40,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:40,342 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-20 14:15:40,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-20 14:15:40,670 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:41,810 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 7 [2018-06-20 14:15:42,054 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 38 [2018-06-20 14:15:42,903 WARN ]: Spent 815.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 122 [2018-06-20 14:15:43,806 WARN ]: Spent 867.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 121 [2018-06-20 14:15:44,133 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 83 [2018-06-20 14:15:44,495 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 52 [2018-06-20 14:15:44,750 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 46 [2018-06-20 14:15:44,931 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 20 [2018-06-20 14:15:45,030 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-20 14:15:45,030 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-20 14:15:45,030 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-20 14:15:45,044 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 Received shutdown request... [2018-06-20 14:15:45,371 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-20 14:15:45,371 INFO ]: Conjunction of SSA is unsat [2018-06-20 14:15:45,390 INFO ]: Computing forward predicates... [2018-06-20 14:15:45,391 INFO ]: Timeout while computing interpolants [2018-06-20 14:15:45,592 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-20 14:15:45,592 WARN ]: Verification canceled [2018-06-20 14:15:45,598 WARN ]: Timeout [2018-06-20 14:15:45,598 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 02:15:45 BoogieIcfgContainer [2018-06-20 14:15:45,598 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-20 14:15:45,599 INFO ]: Toolchain (without parser) took 60771.21 ms. Allocated memory was 305.7 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 244.2 MB in the beginning and 528.0 MB in the end (delta: -283.7 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-06-20 14:15:45,600 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.7 MB. Free memory is still 270.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2018-06-20 14:15:45,600 INFO ]: ChcToBoogie took 467.05 ms. Allocated memory was 305.7 MB in the beginning and 347.1 MB in the end (delta: 41.4 MB). Free memory was 242.3 MB in the beginning and 273.1 MB in the end (delta: -30.8 MB). Peak memory consumption was 72.9 MB. Max. memory is 7.1 GB. [2018-06-20 14:15:45,600 INFO ]: Boogie Preprocessor took 152.26 ms. Allocated memory is still 347.1 MB. Free memory was 273.1 MB in the beginning and 261.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2018-06-20 14:15:45,600 INFO ]: RCFGBuilder took 1065.32 ms. Allocated memory was 347.1 MB in the beginning and 405.3 MB in the end (delta: 58.2 MB). Free memory was 261.9 MB in the beginning and 337.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. [2018-06-20 14:15:45,610 INFO ]: TraceAbstraction took 59077.88 ms. Allocated memory was 405.3 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 337.9 MB in the beginning and 528.0 MB in the end (delta: -190.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-06-20 14:15:45,612 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 305.7 MB. Free memory is still 270.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * ChcToBoogie took 467.05 ms. Allocated memory was 305.7 MB in the beginning and 347.1 MB in the end (delta: 41.4 MB). Free memory was 242.3 MB in the beginning and 273.1 MB in the end (delta: -30.8 MB). Peak memory consumption was 72.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.26 ms. Allocated memory is still 347.1 MB. Free memory was 273.1 MB in the beginning and 261.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1065.32 ms. Allocated memory was 347.1 MB in the beginning and 405.3 MB in the end (delta: 58.2 MB). Free memory was 261.9 MB in the beginning and 337.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 59077.88 ms. Allocated memory was 405.3 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 337.9 MB in the beginning and 528.0 MB in the end (delta: -190.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 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 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.9s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 14.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 155 SDslu, 288 SDs, 0 SdLazy, 242 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 44.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 36.9s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 164828 SizeOfPredicates, 2093 NumberOfNonLiveVariables, 1945 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 79/250 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/chc-lra-0085.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-20_14-15-45-619.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/chc-lra-0085.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-20_14-15-45-619.csv Completed graceful shutdown