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/llreve-bench/smt2/loop__simple-loop.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:12:38,512 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:12:38,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:12:38,531 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:12:38,531 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:12:38,532 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:12:38,534 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:12:38,536 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:12:38,538 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:12:38,538 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:12:38,539 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:12:38,539 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:12:38,542 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:12:38,543 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:12:38,544 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:12:38,544 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:12:38,549 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:12:38,551 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:12:38,565 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:12:38,566 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:12:38,567 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:12:38,570 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:12:38,570 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:12:38,570 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:12:38,571 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:12:38,572 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:12:38,573 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:12:38,579 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:12:38,580 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:12:38,580 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:12:38,581 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:12:38,581 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:12:38,582 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:12:38,582 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:12:38,588 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:12:38,588 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:12:38,604 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:12:38,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:12:38,604 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:12:38,604 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:12:38,606 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:12:38,606 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:12:38,606 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:12:38,606 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:12:38,606 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:12:38,607 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:12:38,608 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:12:38,608 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:12:38,609 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:12:38,609 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:12:38,609 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:12:38,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:12:38,609 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:12:38,611 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:12:38,611 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:12:38,666 INFO ]: Repository-Root is: /tmp [2018-06-22 02:12:38,682 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:12:38,688 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:12:38,690 INFO ]: Initializing SmtParser... [2018-06-22 02:12:38,690 INFO ]: SmtParser initialized [2018-06-22 02:12:38,691 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 [2018-06-22 02:12:38,692 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 02:12:38,819 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@324383c7 [2018-06-22 02:12:38,999 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 [2018-06-22 02:12:39,007 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:12:39,015 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:12:39,016 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:12:39,016 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:12:39,016 INFO ]: ChcToBoogie initialized [2018-06-22 02:12:39,020 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,080 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39 Unit [2018-06-22 02:12:39,081 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:12:39,081 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:12:39,081 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:12:39,081 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:12:39,104 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,104 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,110 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,111 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,113 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,115 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,116 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... [2018-06-22 02:12:39,118 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:12:39,119 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:12:39,119 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:12:39,119 INFO ]: RCFGBuilder initialized [2018-06-22 02:12:39,120 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:12:39,135 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:12:39,135 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:12:39,136 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:12:39,136 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:12:39,136 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:12:39,136 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 02:12:39,342 INFO ]: Using library mode [2018-06-22 02:12:39,343 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:39 BoogieIcfgContainer [2018-06-22 02:12:39,343 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:12:39,345 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:12:39,345 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:12:39,348 INFO ]: TraceAbstraction initialized [2018-06-22 02:12:39,348 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:12:39" (1/3) ... [2018-06-22 02:12:39,349 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed1ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:12:39, skipping insertion in model container [2018-06-22 02:12:39,349 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:12:39" (2/3) ... [2018-06-22 02:12:39,349 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed1ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:12:39, skipping insertion in model container [2018-06-22 02:12:39,350 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:12:39" (3/3) ... [2018-06-22 02:12:39,351 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:12:39,363 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:12:39,372 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:12:39,416 INFO ]: Using default assertion order modulation [2018-06-22 02:12:39,416 INFO ]: Interprodecural is true [2018-06-22 02:12:39,416 INFO ]: Hoare is false [2018-06-22 02:12:39,416 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:12:39,416 INFO ]: Backedges is TWOTRACK [2018-06-22 02:12:39,416 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:12:39,416 INFO ]: Difference is false [2018-06-22 02:12:39,416 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:12:39,416 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:12:39,437 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 02:12:39,449 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:12:39,449 INFO ]: Found error trace [2018-06-22 02:12:39,450 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:39,450 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:39,456 INFO ]: Analyzing trace with hash -204783142, now seen corresponding path program 1 times [2018-06-22 02:12:39,457 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:39,457 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:39,490 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:39,490 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:39,490 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:39,520 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:39,610 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:39,613 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:12:39,613 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:12:39,615 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:12:39,630 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:12:39,631 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:12:39,643 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 02:12:39,773 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:39,774 INFO ]: Finished difference Result 9 states and 13 transitions. [2018-06-22 02:12:39,774 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:12:39,776 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:12:39,776 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:39,788 INFO ]: With dead ends: 9 [2018-06-22 02:12:39,788 INFO ]: Without dead ends: 9 [2018-06-22 02:12:39,792 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 02:12:39,811 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:12:39,845 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:12:39,846 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:12:39,848 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-22 02:12:39,850 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-22 02:12:39,850 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:39,850 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-22 02:12:39,850 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:12:39,850 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-22 02:12:39,851 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:12:39,851 INFO ]: Found error trace [2018-06-22 02:12:39,851 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:39,851 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:39,851 INFO ]: Analyzing trace with hash -2050753703, now seen corresponding path program 1 times [2018-06-22 02:12:39,851 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:39,851 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:39,852 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:39,852 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:39,852 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:39,874 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:39,953 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:39,954 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:39,954 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 02:12:39,963 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:39,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:39,988 INFO ]: Computing forward predicates... [2018-06-22 02:12:40,112 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:40,149 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:40,149 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 02:12:40,149 INFO ]: Interpolant automaton has 5 states [2018-06-22 02:12:40,149 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 02:12:40,150 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:12:40,150 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 5 states. [2018-06-22 02:12:40,417 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:40,417 INFO ]: Finished difference Result 15 states and 31 transitions. [2018-06-22 02:12:40,418 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 02:12:40,418 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 02:12:40,418 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:40,419 INFO ]: With dead ends: 15 [2018-06-22 02:12:40,419 INFO ]: Without dead ends: 15 [2018-06-22 02:12:40,420 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:12:40,420 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 02:12:40,421 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-06-22 02:12:40,421 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:12:40,422 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 19 transitions. [2018-06-22 02:12:40,422 INFO ]: Start accepts. Automaton has 11 states and 19 transitions. Word has length 8 [2018-06-22 02:12:40,422 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:40,422 INFO ]: Abstraction has 11 states and 19 transitions. [2018-06-22 02:12:40,422 INFO ]: Interpolant automaton has 5 states. [2018-06-22 02:12:40,422 INFO ]: Start isEmpty. Operand 11 states and 19 transitions. [2018-06-22 02:12:40,423 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:12:40,423 INFO ]: Found error trace [2018-06-22 02:12:40,423 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:40,423 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:40,423 INFO ]: Analyzing trace with hash -1420477351, now seen corresponding path program 1 times [2018-06-22 02:12:40,423 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:40,423 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:40,424 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:40,424 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:40,424 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:40,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:40,478 INFO ]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:40,479 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:40,479 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 02:12:40,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:40,515 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:40,517 INFO ]: Computing forward predicates... [2018-06-22 02:12:40,753 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:40,786 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:40,786 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2018-06-22 02:12:40,786 INFO ]: Interpolant automaton has 8 states [2018-06-22 02:12:40,786 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 02:12:40,786 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 02:12:40,786 INFO ]: Start difference. First operand 11 states and 19 transitions. Second operand 8 states. [2018-06-22 02:12:41,240 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:41,241 INFO ]: Finished difference Result 22 states and 52 transitions. [2018-06-22 02:12:41,241 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 02:12:41,241 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 02:12:41,241 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:41,242 INFO ]: With dead ends: 22 [2018-06-22 02:12:41,242 INFO ]: Without dead ends: 22 [2018-06-22 02:12:41,243 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-06-22 02:12:41,243 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-22 02:12:41,245 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 12. [2018-06-22 02:12:41,245 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 02:12:41,246 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 22 transitions. [2018-06-22 02:12:41,246 INFO ]: Start accepts. Automaton has 12 states and 22 transitions. Word has length 10 [2018-06-22 02:12:41,246 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:41,246 INFO ]: Abstraction has 12 states and 22 transitions. [2018-06-22 02:12:41,246 INFO ]: Interpolant automaton has 8 states. [2018-06-22 02:12:41,246 INFO ]: Start isEmpty. Operand 12 states and 22 transitions. [2018-06-22 02:12:41,246 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 02:12:41,246 INFO ]: Found error trace [2018-06-22 02:12:41,246 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:41,246 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:41,247 INFO ]: Analyzing trace with hash -1082568518, now seen corresponding path program 2 times [2018-06-22 02:12:41,247 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:41,247 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:41,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:41,248 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:41,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:41,260 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:41,335 INFO ]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:41,335 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:41,335 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 02:12:41,354 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:12:41,389 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:12:41,389 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:41,391 INFO ]: Computing forward predicates... [2018-06-22 02:12:41,603 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:41,633 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:41,633 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-06-22 02:12:41,634 INFO ]: Interpolant automaton has 10 states [2018-06-22 02:12:41,634 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 02:12:41,634 INFO ]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:12:41,634 INFO ]: Start difference. First operand 12 states and 22 transitions. Second operand 10 states. [2018-06-22 02:12:42,651 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:42,651 INFO ]: Finished difference Result 31 states and 79 transitions. [2018-06-22 02:12:42,651 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 02:12:42,651 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-22 02:12:42,651 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:42,652 INFO ]: With dead ends: 31 [2018-06-22 02:12:42,652 INFO ]: Without dead ends: 31 [2018-06-22 02:12:42,653 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-06-22 02:12:42,653 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 02:12:42,655 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 13. [2018-06-22 02:12:42,655 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 02:12:42,656 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 25 transitions. [2018-06-22 02:12:42,656 INFO ]: Start accepts. Automaton has 13 states and 25 transitions. Word has length 11 [2018-06-22 02:12:42,656 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:42,656 INFO ]: Abstraction has 13 states and 25 transitions. [2018-06-22 02:12:42,656 INFO ]: Interpolant automaton has 10 states. [2018-06-22 02:12:42,656 INFO ]: Start isEmpty. Operand 13 states and 25 transitions. [2018-06-22 02:12:42,656 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 02:12:42,656 INFO ]: Found error trace [2018-06-22 02:12:42,657 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:42,657 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:42,657 INFO ]: Analyzing trace with hash 802670713, now seen corresponding path program 3 times [2018-06-22 02:12:42,657 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:42,657 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:42,658 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:42,658 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:42,658 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:42,670 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:42,761 INFO ]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:42,761 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:42,761 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:42,767 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:12:42,801 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 02:12:42,801 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:42,802 INFO ]: Computing forward predicates... [2018-06-22 02:12:42,924 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:42,945 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:42,945 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2018-06-22 02:12:42,946 INFO ]: Interpolant automaton has 12 states [2018-06-22 02:12:42,946 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 02:12:42,946 INFO ]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-06-22 02:12:42,946 INFO ]: Start difference. First operand 13 states and 25 transitions. Second operand 12 states. [2018-06-22 02:12:43,490 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:43,490 INFO ]: Finished difference Result 42 states and 112 transitions. [2018-06-22 02:12:43,490 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-06-22 02:12:43,490 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-22 02:12:43,490 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:43,491 INFO ]: With dead ends: 42 [2018-06-22 02:12:43,491 INFO ]: Without dead ends: 42 [2018-06-22 02:12:43,492 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 02:12:43,492 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-22 02:12:43,496 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 14. [2018-06-22 02:12:43,496 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 02:12:43,496 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 28 transitions. [2018-06-22 02:12:43,496 INFO ]: Start accepts. Automaton has 14 states and 28 transitions. Word has length 12 [2018-06-22 02:12:43,496 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:43,496 INFO ]: Abstraction has 14 states and 28 transitions. [2018-06-22 02:12:43,496 INFO ]: Interpolant automaton has 12 states. [2018-06-22 02:12:43,496 INFO ]: Start isEmpty. Operand 14 states and 28 transitions. [2018-06-22 02:12:43,497 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 02:12:43,497 INFO ]: Found error trace [2018-06-22 02:12:43,497 INFO ]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:43,497 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:43,497 INFO ]: Analyzing trace with hash -884455270, now seen corresponding path program 4 times [2018-06-22 02:12:43,497 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:43,497 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:43,498 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:43,498 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:43,498 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:43,520 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:43,605 INFO ]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:43,605 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:43,605 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 [2018-06-22 02:12:43,615 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 02:12:43,628 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 02:12:43,628 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:43,629 INFO ]: Computing forward predicates... [2018-06-22 02:12:43,754 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:43,775 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:43,775 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2018-06-22 02:12:43,775 INFO ]: Interpolant automaton has 14 states [2018-06-22 02:12:43,775 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 02:12:43,776 INFO ]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-06-22 02:12:43,779 INFO ]: Start difference. First operand 14 states and 28 transitions. Second operand 14 states. [2018-06-22 02:12:44,455 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:44,456 INFO ]: Finished difference Result 55 states and 151 transitions. [2018-06-22 02:12:44,456 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-06-22 02:12:44,456 INFO ]: Start accepts. Automaton has 14 states. Word has length 13 [2018-06-22 02:12:44,456 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:44,457 INFO ]: With dead ends: 55 [2018-06-22 02:12:44,457 INFO ]: Without dead ends: 55 [2018-06-22 02:12:44,459 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2018-06-22 02:12:44,459 INFO ]: Start minimizeSevpa. Operand 55 states. [2018-06-22 02:12:44,462 INFO ]: Finished minimizeSevpa. Reduced states from 55 to 15. [2018-06-22 02:12:44,462 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 02:12:44,463 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 31 transitions. [2018-06-22 02:12:44,463 INFO ]: Start accepts. Automaton has 15 states and 31 transitions. Word has length 13 [2018-06-22 02:12:44,463 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:44,463 INFO ]: Abstraction has 15 states and 31 transitions. [2018-06-22 02:12:44,463 INFO ]: Interpolant automaton has 14 states. [2018-06-22 02:12:44,463 INFO ]: Start isEmpty. Operand 15 states and 31 transitions. [2018-06-22 02:12:44,464 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 02:12:44,464 INFO ]: Found error trace [2018-06-22 02:12:44,464 INFO ]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:44,464 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:44,465 INFO ]: Analyzing trace with hash -1645753191, now seen corresponding path program 5 times [2018-06-22 02:12:44,465 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:44,465 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:44,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:44,465 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:44,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:44,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:44,552 INFO ]: Checked inductivity of 28 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:44,552 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:44,552 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:44,561 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 02:12:44,577 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-22 02:12:44,577 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:44,578 INFO ]: Computing forward predicates... [2018-06-22 02:12:44,593 INFO ]: Checked inductivity of 28 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:44,620 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:44,620 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 02:12:44,621 INFO ]: Interpolant automaton has 9 states [2018-06-22 02:12:44,623 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 02:12:44,623 INFO ]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-06-22 02:12:44,623 INFO ]: Start difference. First operand 15 states and 31 transitions. Second operand 9 states. [2018-06-22 02:12:44,697 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:44,698 INFO ]: Finished difference Result 56 states and 154 transitions. [2018-06-22 02:12:44,699 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 02:12:44,699 INFO ]: Start accepts. Automaton has 9 states. Word has length 14 [2018-06-22 02:12:44,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:44,700 INFO ]: With dead ends: 56 [2018-06-22 02:12:44,700 INFO ]: Without dead ends: 56 [2018-06-22 02:12:44,700 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-06-22 02:12:44,700 INFO ]: Start minimizeSevpa. Operand 56 states. [2018-06-22 02:12:44,703 INFO ]: Finished minimizeSevpa. Reduced states from 56 to 15. [2018-06-22 02:12:44,703 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 02:12:44,704 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 31 transitions. [2018-06-22 02:12:44,704 INFO ]: Start accepts. Automaton has 15 states and 31 transitions. Word has length 14 [2018-06-22 02:12:44,704 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:44,704 INFO ]: Abstraction has 15 states and 31 transitions. [2018-06-22 02:12:44,704 INFO ]: Interpolant automaton has 9 states. [2018-06-22 02:12:44,704 INFO ]: Start isEmpty. Operand 15 states and 31 transitions. [2018-06-22 02:12:44,704 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 02:12:44,705 INFO ]: Found error trace [2018-06-22 02:12:44,705 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:44,705 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:44,705 INFO ]: Analyzing trace with hash 1579861945, now seen corresponding path program 2 times [2018-06-22 02:12:44,705 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:44,705 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:44,706 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:44,706 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:44,706 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:44,718 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:44,913 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:44,913 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:44,913 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:44,919 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:12:44,933 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:12:44,933 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:44,934 INFO ]: Computing forward predicates... [2018-06-22 02:12:45,190 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:45,211 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:45,211 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 02:12:45,212 INFO ]: Interpolant automaton has 18 states [2018-06-22 02:12:45,212 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 02:12:45,212 INFO ]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-06-22 02:12:45,212 INFO ]: Start difference. First operand 15 states and 31 transitions. Second operand 18 states. [2018-06-22 02:12:46,577 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:46,577 INFO ]: Finished difference Result 88 states and 250 transitions. [2018-06-22 02:12:46,577 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-06-22 02:12:46,577 INFO ]: Start accepts. Automaton has 18 states. Word has length 14 [2018-06-22 02:12:46,577 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:46,578 INFO ]: With dead ends: 88 [2018-06-22 02:12:46,578 INFO ]: Without dead ends: 88 [2018-06-22 02:12:46,581 INFO ]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2025, Invalid=4617, Unknown=0, NotChecked=0, Total=6642 [2018-06-22 02:12:46,581 INFO ]: Start minimizeSevpa. Operand 88 states. [2018-06-22 02:12:46,585 INFO ]: Finished minimizeSevpa. Reduced states from 88 to 16. [2018-06-22 02:12:46,585 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 02:12:46,585 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 34 transitions. [2018-06-22 02:12:46,585 INFO ]: Start accepts. Automaton has 16 states and 34 transitions. Word has length 14 [2018-06-22 02:12:46,585 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:46,585 INFO ]: Abstraction has 16 states and 34 transitions. [2018-06-22 02:12:46,585 INFO ]: Interpolant automaton has 18 states. [2018-06-22 02:12:46,585 INFO ]: Start isEmpty. Operand 16 states and 34 transitions. [2018-06-22 02:12:46,586 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 02:12:46,586 INFO ]: Found error trace [2018-06-22 02:12:46,586 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:46,586 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:46,586 INFO ]: Analyzing trace with hash 1733636442, now seen corresponding path program 3 times [2018-06-22 02:12:46,586 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:46,586 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:46,587 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:46,587 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:46,587 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:46,599 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:46,708 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:46,708 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:46,708 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:46,713 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:12:46,722 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 02:12:46,722 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:46,723 INFO ]: Computing forward predicates... [2018-06-22 02:12:46,789 INFO ]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 02:12:46,825 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 02:12:46,825 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2018-06-22 02:12:46,825 INFO ]: Interpolant automaton has 12 states [2018-06-22 02:12:46,825 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 02:12:46,826 INFO ]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-06-22 02:12:46,826 INFO ]: Start difference. First operand 16 states and 34 transitions. Second operand 12 states. [2018-06-22 02:12:46,915 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:46,915 INFO ]: Finished difference Result 62 states and 171 transitions. [2018-06-22 02:12:46,915 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 02:12:46,915 INFO ]: Start accepts. Automaton has 12 states. Word has length 15 [2018-06-22 02:12:46,915 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:46,916 INFO ]: With dead ends: 62 [2018-06-22 02:12:46,916 INFO ]: Without dead ends: 62 [2018-06-22 02:12:46,916 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-06-22 02:12:46,916 INFO ]: Start minimizeSevpa. Operand 62 states. [2018-06-22 02:12:46,919 INFO ]: Finished minimizeSevpa. Reduced states from 62 to 18. [2018-06-22 02:12:46,919 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-22 02:12:46,920 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 39 transitions. [2018-06-22 02:12:46,920 INFO ]: Start accepts. Automaton has 18 states and 39 transitions. Word has length 15 [2018-06-22 02:12:46,920 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:46,920 INFO ]: Abstraction has 18 states and 39 transitions. [2018-06-22 02:12:46,920 INFO ]: Interpolant automaton has 12 states. [2018-06-22 02:12:46,920 INFO ]: Start isEmpty. Operand 18 states and 39 transitions. [2018-06-22 02:12:46,920 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 02:12:46,920 INFO ]: Found error trace [2018-06-22 02:12:46,920 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:46,920 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:46,921 INFO ]: Analyzing trace with hash 1618872539, now seen corresponding path program 1 times [2018-06-22 02:12:46,921 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:46,921 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:46,921 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:46,921 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:46,921 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:46,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:47,029 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:47,030 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:47,030 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:47,037 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:47,051 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:47,053 INFO ]: Computing forward predicates... [2018-06-22 02:12:47,319 INFO ]: Checked inductivity of 45 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:47,339 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:47,339 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2018-06-22 02:12:47,339 INFO ]: Interpolant automaton has 21 states [2018-06-22 02:12:47,340 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 02:12:47,340 INFO ]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-06-22 02:12:47,340 INFO ]: Start difference. First operand 18 states and 39 transitions. Second operand 21 states. [2018-06-22 02:12:51,330 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:51,330 INFO ]: Finished difference Result 109 states and 312 transitions. [2018-06-22 02:12:51,331 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-06-22 02:12:51,331 INFO ]: Start accepts. Automaton has 21 states. Word has length 16 [2018-06-22 02:12:51,331 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:51,332 INFO ]: With dead ends: 109 [2018-06-22 02:12:51,332 INFO ]: Without dead ends: 109 [2018-06-22 02:12:51,335 INFO ]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3054, Invalid=7452, Unknown=0, NotChecked=0, Total=10506 [2018-06-22 02:12:51,335 INFO ]: Start minimizeSevpa. Operand 109 states. [2018-06-22 02:12:51,341 INFO ]: Finished minimizeSevpa. Reduced states from 109 to 19. [2018-06-22 02:12:51,341 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 02:12:51,342 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 42 transitions. [2018-06-22 02:12:51,342 INFO ]: Start accepts. Automaton has 19 states and 42 transitions. Word has length 16 [2018-06-22 02:12:51,342 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:51,342 INFO ]: Abstraction has 19 states and 42 transitions. [2018-06-22 02:12:51,342 INFO ]: Interpolant automaton has 21 states. [2018-06-22 02:12:51,342 INFO ]: Start isEmpty. Operand 19 states and 42 transitions. [2018-06-22 02:12:51,343 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 02:12:51,343 INFO ]: Found error trace [2018-06-22 02:12:51,343 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:51,343 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:51,343 INFO ]: Analyzing trace with hash -1352002440, now seen corresponding path program 2 times [2018-06-22 02:12:51,343 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:51,343 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:51,344 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:51,344 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:12:51,344 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:51,355 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:51,718 INFO ]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:51,719 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:51,719 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 02:12:51,735 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:51,765 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:12:51,765 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:51,767 INFO ]: Computing forward predicates... [2018-06-22 02:12:51,847 INFO ]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:12:51,883 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:51,883 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-06-22 02:12:51,883 INFO ]: Interpolant automaton has 13 states [2018-06-22 02:12:51,883 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 02:12:51,883 INFO ]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-06-22 02:12:51,884 INFO ]: Start difference. First operand 19 states and 42 transitions. Second operand 13 states. [2018-06-22 02:12:51,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:51,987 INFO ]: Finished difference Result 74 states and 207 transitions. [2018-06-22 02:12:51,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 02:12:51,987 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 02:12:51,987 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:51,988 INFO ]: With dead ends: 74 [2018-06-22 02:12:51,988 INFO ]: Without dead ends: 74 [2018-06-22 02:12:51,988 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-06-22 02:12:51,988 INFO ]: Start minimizeSevpa. Operand 74 states. [2018-06-22 02:12:51,991 INFO ]: Finished minimizeSevpa. Reduced states from 74 to 19. [2018-06-22 02:12:51,992 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 02:12:51,992 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 42 transitions. [2018-06-22 02:12:51,992 INFO ]: Start accepts. Automaton has 19 states and 42 transitions. Word has length 17 [2018-06-22 02:12:51,992 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:51,992 INFO ]: Abstraction has 19 states and 42 transitions. [2018-06-22 02:12:51,992 INFO ]: Interpolant automaton has 13 states. [2018-06-22 02:12:51,992 INFO ]: Start isEmpty. Operand 19 states and 42 transitions. [2018-06-22 02:12:51,993 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 02:12:51,993 INFO ]: Found error trace [2018-06-22 02:12:51,993 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:51,993 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:51,993 INFO ]: Analyzing trace with hash 357089330, now seen corresponding path program 6 times [2018-06-22 02:12:51,993 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:51,993 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:51,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:51,994 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:51,994 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:52,019 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:52,282 INFO ]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:52,282 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:52,282 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:52,293 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 02:12:52,317 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 02:12:52,317 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:52,318 INFO ]: Computing forward predicates... [2018-06-22 02:12:52,343 INFO ]: Checked inductivity of 66 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 02:12:52,363 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:52,363 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 15 [2018-06-22 02:12:52,363 INFO ]: Interpolant automaton has 15 states [2018-06-22 02:12:52,363 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 02:12:52,363 INFO ]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2018-06-22 02:12:52,364 INFO ]: Start difference. First operand 19 states and 42 transitions. Second operand 15 states. [2018-06-22 02:12:52,436 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:52,436 INFO ]: Finished difference Result 86 states and 241 transitions. [2018-06-22 02:12:52,437 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 02:12:52,437 INFO ]: Start accepts. Automaton has 15 states. Word has length 18 [2018-06-22 02:12:52,437 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:52,437 INFO ]: With dead ends: 86 [2018-06-22 02:12:52,437 INFO ]: Without dead ends: 85 [2018-06-22 02:12:52,437 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2018-06-22 02:12:52,438 INFO ]: Start minimizeSevpa. Operand 85 states. [2018-06-22 02:12:52,440 INFO ]: Finished minimizeSevpa. Reduced states from 85 to 20. [2018-06-22 02:12:52,440 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 02:12:52,441 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 44 transitions. [2018-06-22 02:12:52,441 INFO ]: Start accepts. Automaton has 20 states and 44 transitions. Word has length 18 [2018-06-22 02:12:52,441 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:52,441 INFO ]: Abstraction has 20 states and 44 transitions. [2018-06-22 02:12:52,441 INFO ]: Interpolant automaton has 15 states. [2018-06-22 02:12:52,441 INFO ]: Start isEmpty. Operand 20 states and 44 transitions. [2018-06-22 02:12:52,441 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 02:12:52,441 INFO ]: Found error trace [2018-06-22 02:12:52,441 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:12:52,441 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:12:52,442 INFO ]: Analyzing trace with hash 1040153723, now seen corresponding path program 3 times [2018-06-22 02:12:52,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:12:52,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:12:52,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:52,443 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:12:52,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:12:52,468 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:52,819 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:12:52,819 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:12:52,819 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:12:52,825 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:12:52,870 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 02:12:52,870 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:12:52,872 INFO ]: Computing forward predicates... [2018-06-22 02:12:52,934 INFO ]: Checked inductivity of 66 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 02:12:52,960 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:12:52,960 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4] total 16 [2018-06-22 02:12:52,960 INFO ]: Interpolant automaton has 16 states [2018-06-22 02:12:52,960 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 02:12:52,960 INFO ]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-06-22 02:12:52,960 INFO ]: Start difference. First operand 20 states and 44 transitions. Second operand 16 states. [2018-06-22 02:12:53,097 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:12:53,097 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 02:12:53,098 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 02:12:53,098 INFO ]: Start accepts. Automaton has 16 states. Word has length 18 [2018-06-22 02:12:53,098 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:12:53,098 INFO ]: With dead ends: 15 [2018-06-22 02:12:53,098 INFO ]: Without dead ends: 0 [2018-06-22 02:12:53,098 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-06-22 02:12:53,098 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 02:12:53,098 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 02:12:53,098 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 02:12:53,098 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 02:12:53,098 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-22 02:12:53,098 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:12:53,098 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 02:12:53,098 INFO ]: Interpolant automaton has 16 states. [2018-06-22 02:12:53,098 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 02:12:53,098 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 02:12:53,102 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:12:53 BoogieIcfgContainer [2018-06-22 02:12:53,102 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:12:53,103 INFO ]: Toolchain (without parser) took 14094.83 ms. Allocated memory was 309.9 MB in the beginning and 431.5 MB in the end (delta: 121.6 MB). Free memory was 267.2 MB in the beginning and 302.0 MB in the end (delta: -34.8 MB). Peak memory consumption was 86.8 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:53,104 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:12:53,105 INFO ]: ChcToBoogie took 64.91 ms. Allocated memory is still 309.9 MB. Free memory was 267.2 MB in the beginning and 264.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:53,105 INFO ]: Boogie Preprocessor took 37.03 ms. Allocated memory is still 309.9 MB. Free memory was 264.2 MB in the beginning and 263.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 02:12:53,106 INFO ]: RCFGBuilder took 224.19 ms. Allocated memory is still 309.9 MB. Free memory was 263.2 MB in the beginning and 257.2 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:53,106 INFO ]: TraceAbstraction took 13757.43 ms. Allocated memory was 309.9 MB in the beginning and 431.5 MB in the end (delta: 121.6 MB). Free memory was 257.2 MB in the beginning and 302.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 76.9 MB. Max. memory is 3.6 GB. [2018-06-22 02:12:53,112 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 64.91 ms. Allocated memory is still 309.9 MB. Free memory was 267.2 MB in the beginning and 264.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 37.03 ms. Allocated memory is still 309.9 MB. Free memory was 264.2 MB in the beginning and 263.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 224.19 ms. Allocated memory is still 309.9 MB. Free memory was 263.2 MB in the beginning and 257.2 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 13757.43 ms. Allocated memory was 309.9 MB in the beginning and 431.5 MB in the end (delta: 121.6 MB). Free memory was 257.2 MB in the beginning and 302.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 76.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 13.6s OverallTime, 13 OverallIterations, 10 TraceHistogramMax, 8.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 0 SDslu, 427 SDs, 0 SdLazy, 428 SolverSat, 1208 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 501 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7447 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=12, 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, 13 MinimizatonAttempts, 467 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 339 NumberOfCodeBlocks, 322 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 314 ConstructedInterpolants, 0 QuantifiedInterpolants, 9150 SizeOfPredicates, 9 NumberOfNonLiveVariables, 958 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 25 InterpolantComputations, 2 PerfectInterpolantSequences, 250/754 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__simple-loop.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-12-53-133.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__simple-loop.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-12-53-133.csv Received shutdown request...