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__barthe2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:10:44,129 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:10:44,131 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:10:44,143 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:10:44,143 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:10:44,145 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:10:44,146 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:10:44,148 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:10:44,149 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:10:44,150 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:10:44,151 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:10:44,151 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:10:44,152 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:10:44,154 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:10:44,154 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:10:44,155 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:10:44,157 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:10:44,159 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:10:44,161 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:10:44,165 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:10:44,166 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:10:44,169 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:10:44,169 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:10:44,169 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:10:44,170 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:10:44,171 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:10:44,172 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:10:44,173 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:10:44,174 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:10:44,174 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:10:44,175 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:10:44,176 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:10:44,176 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:10:44,177 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:10:44,178 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:10:44,178 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:10:44,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:10:44,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:10:44,194 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:10:44,194 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:10:44,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:10:44,195 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:10:44,195 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:10:44,196 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:10:44,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:10:44,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:10:44,196 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:10:44,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:10:44,197 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:10:44,197 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:10:44,197 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:10:44,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:10:44,197 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:10:44,199 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:10:44,199 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:10:44,248 INFO ]: Repository-Root is: /tmp [2018-06-22 02:10:44,263 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:10:44,266 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:10:44,270 INFO ]: Initializing SmtParser... [2018-06-22 02:10:44,270 INFO ]: SmtParser initialized [2018-06-22 02:10:44,271 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__barthe2.smt2 [2018-06-22 02:10:44,272 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 02:10:44,371 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__barthe2.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@10aef598 [2018-06-22 02:10:44,541 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__barthe2.smt2 [2018-06-22 02:10:44,546 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:10:44,553 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:10:44,553 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:10:44,553 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:10:44,554 INFO ]: ChcToBoogie initialized [2018-06-22 02:10:44,558 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,626 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44 Unit [2018-06-22 02:10:44,626 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:10:44,627 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:10:44,627 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:10:44,627 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:10:44,650 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,650 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,656 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,656 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,659 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,661 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,662 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... [2018-06-22 02:10:44,664 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:10:44,665 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:10:44,665 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:10:44,665 INFO ]: RCFGBuilder initialized [2018-06-22 02:10:44,666 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 02:10:44,681 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:10:44,681 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:10:44,681 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:10:44,681 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:10:44,681 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:10:44,681 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:10:44,967 INFO ]: Using library mode [2018-06-22 02:10:44,968 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:10:44 BoogieIcfgContainer [2018-06-22 02:10:44,968 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:10:44,977 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:10:44,977 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:10:44,980 INFO ]: TraceAbstraction initialized [2018-06-22 02:10:44,980 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:10:44" (1/3) ... [2018-06-22 02:10:44,981 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d968c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:10:44, skipping insertion in model container [2018-06-22 02:10:44,981 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:44" (2/3) ... [2018-06-22 02:10:44,982 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d968c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:10:44, skipping insertion in model container [2018-06-22 02:10:44,982 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:10:44" (3/3) ... [2018-06-22 02:10:44,984 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:10:45,000 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:10:45,009 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:10:45,056 INFO ]: Using default assertion order modulation [2018-06-22 02:10:45,057 INFO ]: Interprodecural is true [2018-06-22 02:10:45,057 INFO ]: Hoare is false [2018-06-22 02:10:45,057 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:10:45,057 INFO ]: Backedges is TWOTRACK [2018-06-22 02:10:45,057 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:10:45,057 INFO ]: Difference is false [2018-06-22 02:10:45,057 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:10:45,057 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:10:45,073 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 02:10:45,083 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:10:45,083 INFO ]: Found error trace [2018-06-22 02:10:45,084 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:45,084 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:45,088 INFO ]: Analyzing trace with hash -204783142, now seen corresponding path program 1 times [2018-06-22 02:10:45,090 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:45,090 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:45,146 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,147 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:45,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,205 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:45,269 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:45,271 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:10:45,271 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:10:45,272 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:10:45,288 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:10:45,289 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:10:45,291 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 02:10:45,353 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:45,353 INFO ]: Finished difference Result 9 states and 13 transitions. [2018-06-22 02:10:45,354 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:10:45,355 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:10:45,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:45,364 INFO ]: With dead ends: 9 [2018-06-22 02:10:45,364 INFO ]: Without dead ends: 9 [2018-06-22 02:10:45,366 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 02:10:45,385 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 02:10:45,400 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 02:10:45,402 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:10:45,402 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-22 02:10:45,404 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-22 02:10:45,404 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:45,404 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-22 02:10:45,404 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:10:45,404 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-22 02:10:45,405 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:10:45,405 INFO ]: Found error trace [2018-06-22 02:10:45,405 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:45,405 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:45,405 INFO ]: Analyzing trace with hash -2057218350, now seen corresponding path program 1 times [2018-06-22 02:10:45,405 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:45,405 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:45,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,406 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:45,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,431 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:45,516 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:45,516 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:10:45,516 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:10:45,517 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:10:45,518 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:10:45,518 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:10:45,518 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 3 states. [2018-06-22 02:10:45,609 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:45,609 INFO ]: Finished difference Result 10 states and 16 transitions. [2018-06-22 02:10:45,609 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:10:45,610 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-22 02:10:45,610 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:45,610 INFO ]: With dead ends: 10 [2018-06-22 02:10:45,610 INFO ]: Without dead ends: 10 [2018-06-22 02:10:45,611 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 02:10:45,611 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 02:10:45,612 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-06-22 02:10:45,612 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 02:10:45,613 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-22 02:10:45,613 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 8 [2018-06-22 02:10:45,613 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:45,613 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-22 02:10:45,613 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:10:45,613 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-22 02:10:45,613 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:10:45,613 INFO ]: Found error trace [2018-06-22 02:10:45,613 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:45,613 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:45,615 INFO ]: Analyzing trace with hash -2050753703, now seen corresponding path program 1 times [2018-06-22 02:10:45,615 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:45,615 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:45,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,616 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:45,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:45,638 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:45,911 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:45,911 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:45,912 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) [2018-06-22 02:10:45,939 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:10:45,987 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:45,997 INFO ]: Computing forward predicates... [2018-06-22 02:10:46,088 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:46,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:46,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 02:10:46,108 INFO ]: Interpolant automaton has 6 states [2018-06-22 02:10:46,109 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 02:10:46,109 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 02:10:46,109 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 6 states. [2018-06-22 02:10:46,481 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:46,481 INFO ]: Finished difference Result 12 states and 22 transitions. [2018-06-22 02:10:46,483 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 02:10:46,483 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 02:10:46,483 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:46,483 INFO ]: With dead ends: 12 [2018-06-22 02:10:46,483 INFO ]: Without dead ends: 12 [2018-06-22 02:10:46,484 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 02:10:46,484 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 02:10:46,485 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-06-22 02:10:46,485 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 02:10:46,486 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 19 transitions. [2018-06-22 02:10:46,486 INFO ]: Start accepts. Automaton has 11 states and 19 transitions. Word has length 8 [2018-06-22 02:10:46,486 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:46,486 INFO ]: Abstraction has 11 states and 19 transitions. [2018-06-22 02:10:46,486 INFO ]: Interpolant automaton has 6 states. [2018-06-22 02:10:46,486 INFO ]: Start isEmpty. Operand 11 states and 19 transitions. [2018-06-22 02:10:46,486 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 02:10:46,486 INFO ]: Found error trace [2018-06-22 02:10:46,486 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:46,486 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:46,486 INFO ]: Analyzing trace with hash -2048906661, now seen corresponding path program 1 times [2018-06-22 02:10:46,486 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:46,486 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:46,489 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:46,489 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:46,489 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:46,510 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:46,744 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:46,744 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:46,744 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 02:10:46,751 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:46,784 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:46,789 INFO ]: Computing forward predicates... [2018-06-22 02:10:46,844 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:46,866 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:46,866 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 02:10:46,866 INFO ]: Interpolant automaton has 5 states [2018-06-22 02:10:46,866 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 02:10:46,866 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 02:10:46,867 INFO ]: Start difference. First operand 11 states and 19 transitions. Second operand 5 states. [2018-06-22 02:10:46,984 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 02:10:47,098 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:47,098 INFO ]: Finished difference Result 14 states and 26 transitions. [2018-06-22 02:10:47,099 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 02:10:47,099 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 02:10:47,099 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:47,099 INFO ]: With dead ends: 14 [2018-06-22 02:10:47,099 INFO ]: Without dead ends: 14 [2018-06-22 02:10:47,100 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 02:10:47,100 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 02:10:47,102 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-06-22 02:10:47,102 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 02:10:47,102 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 23 transitions. [2018-06-22 02:10:47,102 INFO ]: Start accepts. Automaton has 13 states and 23 transitions. Word has length 8 [2018-06-22 02:10:47,102 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:47,102 INFO ]: Abstraction has 13 states and 23 transitions. [2018-06-22 02:10:47,102 INFO ]: Interpolant automaton has 5 states. [2018-06-22 02:10:47,102 INFO ]: Start isEmpty. Operand 13 states and 23 transitions. [2018-06-22 02:10:47,103 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 02:10:47,103 INFO ]: Found error trace [2018-06-22 02:10:47,103 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:47,103 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:47,103 INFO ]: Analyzing trace with hash 853701050, now seen corresponding path program 2 times [2018-06-22 02:10:47,103 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:47,103 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:47,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:47,104 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:47,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:47,114 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:47,287 INFO ]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:47,287 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:47,287 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 02:10:47,319 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:10:47,338 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:10:47,338 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:47,339 INFO ]: Computing forward predicates... [2018-06-22 02:10:47,418 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:47,439 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 02:10:47,439 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-06-22 02:10:47,439 INFO ]: Interpolant automaton has 7 states [2018-06-22 02:10:47,439 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 02:10:47,439 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 02:10:47,439 INFO ]: Start difference. First operand 13 states and 23 transitions. Second operand 7 states. [2018-06-22 02:10:47,701 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 02:10:47,943 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 02:10:47,972 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:47,972 INFO ]: Finished difference Result 21 states and 41 transitions. [2018-06-22 02:10:47,973 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 02:10:47,973 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 02:10:47,973 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:47,975 INFO ]: With dead ends: 21 [2018-06-22 02:10:47,975 INFO ]: Without dead ends: 21 [2018-06-22 02:10:47,976 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-22 02:10:47,976 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 02:10:47,979 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 17. [2018-06-22 02:10:47,979 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 02:10:47,980 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 34 transitions. [2018-06-22 02:10:47,980 INFO ]: Start accepts. Automaton has 17 states and 34 transitions. Word has length 9 [2018-06-22 02:10:47,980 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:47,980 INFO ]: Abstraction has 17 states and 34 transitions. [2018-06-22 02:10:47,980 INFO ]: Interpolant automaton has 7 states. [2018-06-22 02:10:47,980 INFO ]: Start isEmpty. Operand 17 states and 34 transitions. [2018-06-22 02:10:47,980 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:10:47,980 INFO ]: Found error trace [2018-06-22 02:10:47,980 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:47,980 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:47,980 INFO ]: Analyzing trace with hash 756590521, now seen corresponding path program 1 times [2018-06-22 02:10:47,981 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:47,981 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:47,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:47,981 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:10:47,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:48,013 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:48,142 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:48,142 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:48,142 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 02:10:48,154 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:48,172 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:48,174 INFO ]: Computing forward predicates... [2018-06-22 02:10:48,342 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:48,364 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:48,364 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 02:10:48,365 INFO ]: Interpolant automaton has 9 states [2018-06-22 02:10:48,365 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 02:10:48,365 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 02:10:48,365 INFO ]: Start difference. First operand 17 states and 34 transitions. Second operand 9 states. [2018-06-22 02:10:48,540 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:48,540 INFO ]: Finished difference Result 21 states and 45 transitions. [2018-06-22 02:10:48,540 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 02:10:48,540 INFO ]: Start accepts. Automaton has 9 states. Word has length 10 [2018-06-22 02:10:48,540 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:48,541 INFO ]: With dead ends: 21 [2018-06-22 02:10:48,541 INFO ]: Without dead ends: 21 [2018-06-22 02:10:48,541 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:10:48,541 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 02:10:48,544 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-06-22 02:10:48,544 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 02:10:48,544 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 42 transitions. [2018-06-22 02:10:48,544 INFO ]: Start accepts. Automaton has 20 states and 42 transitions. Word has length 10 [2018-06-22 02:10:48,544 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:48,544 INFO ]: Abstraction has 20 states and 42 transitions. [2018-06-22 02:10:48,545 INFO ]: Interpolant automaton has 9 states. [2018-06-22 02:10:48,545 INFO ]: Start isEmpty. Operand 20 states and 42 transitions. [2018-06-22 02:10:48,545 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:10:48,545 INFO ]: Found error trace [2018-06-22 02:10:48,545 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:48,545 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:48,545 INFO ]: Analyzing trace with hash -1765216455, now seen corresponding path program 2 times [2018-06-22 02:10:48,545 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:48,545 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:48,546 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:48,546 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:10:48,546 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:48,562 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:48,620 INFO ]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:48,620 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:10:48,620 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 02:10:48,621 INFO ]: Interpolant automaton has 4 states [2018-06-22 02:10:48,621 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 02:10:48,621 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 02:10:48,621 INFO ]: Start difference. First operand 20 states and 42 transitions. Second operand 4 states. [2018-06-22 02:10:48,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:48,636 INFO ]: Finished difference Result 19 states and 32 transitions. [2018-06-22 02:10:48,636 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 02:10:48,636 INFO ]: Start accepts. Automaton has 4 states. Word has length 10 [2018-06-22 02:10:48,637 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:48,637 INFO ]: With dead ends: 19 [2018-06-22 02:10:48,637 INFO ]: Without dead ends: 19 [2018-06-22 02:10:48,637 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 02:10:48,638 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 02:10:48,640 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-06-22 02:10:48,640 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 02:10:48,640 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 22 transitions. [2018-06-22 02:10:48,640 INFO ]: Start accepts. Automaton has 14 states and 22 transitions. Word has length 10 [2018-06-22 02:10:48,640 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:48,641 INFO ]: Abstraction has 14 states and 22 transitions. [2018-06-22 02:10:48,641 INFO ]: Interpolant automaton has 4 states. [2018-06-22 02:10:48,641 INFO ]: Start isEmpty. Operand 14 states and 22 transitions. [2018-06-22 02:10:48,641 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 02:10:48,641 INFO ]: Found error trace [2018-06-22 02:10:48,641 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:48,641 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:48,641 INFO ]: Analyzing trace with hash -1763369413, now seen corresponding path program 2 times [2018-06-22 02:10:48,641 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:48,641 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:48,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:48,642 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:10:48,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:48,653 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:48,951 INFO ]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:10:48,951 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:48,951 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 02:10:48,967 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 02:10:48,995 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 02:10:48,995 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:48,997 INFO ]: Computing forward predicates... [2018-06-22 02:10:49,049 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:49,071 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:49,071 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2018-06-22 02:10:49,071 INFO ]: Interpolant automaton has 8 states [2018-06-22 02:10:49,071 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 02:10:49,071 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 02:10:49,071 INFO ]: Start difference. First operand 14 states and 22 transitions. Second operand 8 states. [2018-06-22 02:10:49,307 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:49,307 INFO ]: Finished difference Result 24 states and 42 transitions. [2018-06-22 02:10:49,307 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 02:10:49,307 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 02:10:49,307 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:49,307 INFO ]: With dead ends: 24 [2018-06-22 02:10:49,307 INFO ]: Without dead ends: 14 [2018-06-22 02:10:49,308 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-06-22 02:10:49,308 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 02:10:49,309 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 02:10:49,309 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 02:10:49,309 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-06-22 02:10:49,309 INFO ]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-06-22 02:10:49,309 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:49,309 INFO ]: Abstraction has 14 states and 16 transitions. [2018-06-22 02:10:49,309 INFO ]: Interpolant automaton has 8 states. [2018-06-22 02:10:49,309 INFO ]: Start isEmpty. Operand 14 states and 16 transitions. [2018-06-22 02:10:49,310 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 02:10:49,310 INFO ]: Found error trace [2018-06-22 02:10:49,310 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:49,310 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:49,310 INFO ]: Analyzing trace with hash 208865754, now seen corresponding path program 3 times [2018-06-22 02:10:49,310 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:49,310 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:49,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:49,311 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:10:49,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:49,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:49,387 INFO ]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 02:10:49,387 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:49,387 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 02:10:49,392 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 02:10:49,411 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 02:10:49,411 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:49,413 INFO ]: Computing forward predicates... [2018-06-22 02:10:49,502 INFO ]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:49,525 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:49,525 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-06-22 02:10:49,525 INFO ]: Interpolant automaton has 10 states [2018-06-22 02:10:49,525 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 02:10:49,525 INFO ]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:10:49,526 INFO ]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2018-06-22 02:10:49,600 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:49,600 INFO ]: Finished difference Result 20 states and 24 transitions. [2018-06-22 02:10:49,600 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 02:10:49,600 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-22 02:10:49,600 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:49,601 INFO ]: With dead ends: 20 [2018-06-22 02:10:49,601 INFO ]: Without dead ends: 13 [2018-06-22 02:10:49,601 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-06-22 02:10:49,601 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 02:10:49,602 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 02:10:49,602 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 02:10:49,603 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 02:10:49,603 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 02:10:49,603 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:49,603 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 02:10:49,603 INFO ]: Interpolant automaton has 10 states. [2018-06-22 02:10:49,603 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 02:10:49,603 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 02:10:49,603 INFO ]: Found error trace [2018-06-22 02:10:49,603 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:10:49,603 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:10:49,604 INFO ]: Analyzing trace with hash 1374927897, now seen corresponding path program 4 times [2018-06-22 02:10:49,604 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:10:49,604 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:10:49,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:49,604 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 02:10:49,604 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:10:49,643 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:49,769 INFO ]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 02:10:49,769 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:10:49,769 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 02:10:49,779 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 02:10:49,804 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 02:10:49,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:10:49,807 INFO ]: Computing forward predicates... [2018-06-22 02:10:49,907 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:10:49,936 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:10:49,936 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-06-22 02:10:49,936 INFO ]: Interpolant automaton has 10 states [2018-06-22 02:10:49,937 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 02:10:49,937 INFO ]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:10:49,937 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-22 02:10:49,975 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:10:49,975 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 02:10:49,975 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 02:10:49,975 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-22 02:10:49,975 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:10:49,975 INFO ]: With dead ends: 10 [2018-06-22 02:10:49,975 INFO ]: Without dead ends: 0 [2018-06-22 02:10:49,975 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 02:10:49,975 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 02:10:49,975 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 02:10:49,975 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 02:10:49,975 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 02:10:49,976 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-06-22 02:10:49,976 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:10:49,976 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 02:10:49,976 INFO ]: Interpolant automaton has 10 states. [2018-06-22 02:10:49,976 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 02:10:49,976 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 02:10:49,981 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:10:49 BoogieIcfgContainer [2018-06-22 02:10:49,981 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:10:49,982 INFO ]: Toolchain (without parser) took 5435.16 ms. Allocated memory was 308.8 MB in the beginning and 340.3 MB in the end (delta: 31.5 MB). Free memory was 265.2 MB in the beginning and 269.2 MB in the end (delta: -4.0 MB). Peak memory consumption was 27.4 MB. Max. memory is 3.6 GB. [2018-06-22 02:10:49,983 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:10:49,983 INFO ]: ChcToBoogie took 73.00 ms. Allocated memory is still 308.8 MB. Free memory was 265.2 MB in the beginning and 263.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:10:49,984 INFO ]: Boogie Preprocessor took 36.65 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:10:49,984 INFO ]: RCFGBuilder took 303.48 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 253.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:10:49,985 INFO ]: TraceAbstraction took 5004.45 ms. Allocated memory was 308.8 MB in the beginning and 340.3 MB in the end (delta: 31.5 MB). Free memory was 253.2 MB in the beginning and 269.2 MB in the end (delta: -16.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 3.6 GB. [2018-06-22 02:10:49,989 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.00 ms. Allocated memory is still 308.8 MB. Free memory was 265.2 MB in the beginning and 263.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.65 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 303.48 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 253.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5004.45 ms. Allocated memory was 308.8 MB in the beginning and 340.3 MB in the end (delta: 31.5 MB). Free memory was 253.2 MB in the beginning and 269.2 MB in the end (delta: -16.0 MB). Peak memory consumption was 15.5 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, 4.9s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 1.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 11 SDslu, 151 SDs, 0 SdLazy, 332 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 10 MinimizatonAttempts, 13 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 5897 SizeOfPredicates, 27 NumberOfNonLiveVariables, 726 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 26/91 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__barthe2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-10-50-000.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__barthe2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-10-50-000.csv Received shutdown request...