java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/llreve/upcount_merged_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:05:20,156 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:05:20,159 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:05:20,171 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:05:20,172 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:05:20,173 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:05:20,174 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:05:20,176 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:05:20,178 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:05:20,178 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:05:20,179 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:05:20,180 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:05:20,180 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:05:20,181 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:05:20,182 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:05:20,183 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:05:20,185 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:05:20,187 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:05:20,189 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:05:20,190 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:05:20,191 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:05:20,194 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:05:20,194 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:05:20,194 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:05:20,195 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:05:20,196 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:05:20,197 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:05:20,198 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:05:20,199 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:05:20,199 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:05:20,200 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:05:20,201 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:05:20,201 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:05:20,202 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:05:20,202 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:05:20,203 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:05:20,216 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:05:20,217 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:05:20,217 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:05:20,217 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:05:20,218 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:05:20,219 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:05:20,219 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:05:20,219 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:05:20,219 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:05:20,220 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:05:20,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:05:20,220 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:05:20,220 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:05:20,220 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:05:20,221 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:05:20,221 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:05:20,221 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:05:20,221 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:05:20,222 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:05:20,223 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:05:20,223 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:05:20,261 INFO ]: Repository-Root is: /tmp [2018-06-22 11:05:20,278 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:05:20,281 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:05:20,283 INFO ]: Initializing SmtParser... [2018-06-22 11:05:20,283 INFO ]: SmtParser initialized [2018-06-22 11:05:20,284 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/upcount_merged_safe.c-1.smt2 [2018-06-22 11:05:20,285 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 11:05:20,380 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/upcount_merged_safe.c-1.smt2 unknown [2018-06-22 11:05:20,551 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/upcount_merged_safe.c-1.smt2 [2018-06-22 11:05:20,557 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:05:20,563 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:05:20,564 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:05:20,567 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:05:20,568 INFO ]: ChcToBoogie initialized [2018-06-22 11:05:20,571 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,611 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20 Unit [2018-06-22 11:05:20,611 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:05:20,614 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:05:20,614 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:05:20,614 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:05:20,632 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,632 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,639 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,639 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,641 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,644 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,645 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (1/1) ... [2018-06-22 11:05:20,646 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:05:20,648 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:05:20,648 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:05:20,648 INFO ]: RCFGBuilder initialized [2018-06-22 11:05:20,649 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (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 11:05:20,667 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:05:20,667 INFO ]: Found specification of procedure False [2018-06-22 11:05:20,667 INFO ]: Found implementation of procedure False [2018-06-22 11:05:20,667 INFO ]: Specification and implementation of procedure inv_main8 given in one single declaration [2018-06-22 11:05:20,667 INFO ]: Found specification of procedure inv_main8 [2018-06-22 11:05:20,667 INFO ]: Found implementation of procedure inv_main8 [2018-06-22 11:05:20,668 INFO ]: Specification and implementation of procedure inv_main5 given in one single declaration [2018-06-22 11:05:20,668 INFO ]: Found specification of procedure inv_main5 [2018-06-22 11:05:20,668 INFO ]: Found implementation of procedure inv_main5 [2018-06-22 11:05:20,668 INFO ]: Specification and implementation of procedure inv_main4 given in one single declaration [2018-06-22 11:05:20,668 INFO ]: Found specification of procedure inv_main4 [2018-06-22 11:05:20,668 INFO ]: Found implementation of procedure inv_main4 [2018-06-22 11:05:20,668 INFO ]: Specification and implementation of procedure inv_main2 given in one single declaration [2018-06-22 11:05:20,668 INFO ]: Found specification of procedure inv_main2 [2018-06-22 11:05:20,668 INFO ]: Found implementation of procedure inv_main2 [2018-06-22 11:05:20,668 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:05:20,668 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:05:20,668 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 11:05:20,927 INFO ]: Using library mode [2018-06-22 11:05:20,927 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:05:20 BoogieIcfgContainer [2018-06-22 11:05:20,927 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:05:20,928 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:05:20,929 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:05:20,933 INFO ]: TraceAbstraction initialized [2018-06-22 11:05:20,933 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:05:20" (1/3) ... [2018-06-22 11:05:20,934 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f19ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:05:20, skipping insertion in model container [2018-06-22 11:05:20,934 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:05:20" (2/3) ... [2018-06-22 11:05:20,934 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f19ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:05:20, skipping insertion in model container [2018-06-22 11:05:20,934 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:05:20" (3/3) ... [2018-06-22 11:05:20,936 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:05:20,949 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:05:20,959 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:05:21,004 INFO ]: Using default assertion order modulation [2018-06-22 11:05:21,005 INFO ]: Interprodecural is true [2018-06-22 11:05:21,005 INFO ]: Hoare is false [2018-06-22 11:05:21,005 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:05:21,005 INFO ]: Backedges is TWOTRACK [2018-06-22 11:05:21,005 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:05:21,005 INFO ]: Difference is false [2018-06-22 11:05:21,005 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:05:21,005 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:05:21,018 INFO ]: Start isEmpty. Operand 26 states. [2018-06-22 11:05:21,028 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:05:21,028 INFO ]: Found error trace [2018-06-22 11:05:21,029 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:21,029 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:21,034 INFO ]: Analyzing trace with hash -238741670, now seen corresponding path program 1 times [2018-06-22 11:05:21,036 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:21,037 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:21,071 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:21,072 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:21,072 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:21,111 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:21,302 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:05:21,304 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:05:21,304 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 11:05:21,307 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:05:21,322 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:05:21,323 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:05:21,325 INFO ]: Start difference. First operand 26 states. Second operand 7 states. [2018-06-22 11:05:21,540 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:21,540 INFO ]: Finished difference Result 30 states and 34 transitions. [2018-06-22 11:05:21,540 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:05:21,542 INFO ]: Start accepts. Automaton has 7 states. Word has length 21 [2018-06-22 11:05:21,542 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:21,551 INFO ]: With dead ends: 30 [2018-06-22 11:05:21,551 INFO ]: Without dead ends: 26 [2018-06-22 11:05:21,553 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:05:21,566 INFO ]: Start minimizeSevpa. Operand 26 states. [2018-06-22 11:05:21,588 INFO ]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-06-22 11:05:21,590 INFO ]: Start removeUnreachable. Operand 26 states. [2018-06-22 11:05:21,591 INFO ]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-06-22 11:05:21,592 INFO ]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2018-06-22 11:05:21,592 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:21,592 INFO ]: Abstraction has 26 states and 29 transitions. [2018-06-22 11:05:21,592 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:05:21,592 INFO ]: Start isEmpty. Operand 26 states and 29 transitions. [2018-06-22 11:05:21,594 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:05:21,594 INFO ]: Found error trace [2018-06-22 11:05:21,594 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:21,595 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:21,595 INFO ]: Analyzing trace with hash -1803147073, now seen corresponding path program 1 times [2018-06-22 11:05:21,595 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:21,595 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:21,596 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:21,596 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:21,596 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:21,617 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:22,200 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:05:22,200 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:22,200 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 11:05:22,210 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:22,252 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:22,263 INFO ]: Computing forward predicates... [2018-06-22 11:05:22,634 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:05:22,668 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:22,668 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 11:05:22,668 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:05:22,668 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:05:22,669 INFO ]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:05:22,669 INFO ]: Start difference. First operand 26 states and 29 transitions. Second operand 12 states. [2018-06-22 11:05:22,845 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:22,845 INFO ]: Finished difference Result 32 states and 36 transitions. [2018-06-22 11:05:22,846 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:05:22,846 INFO ]: Start accepts. Automaton has 12 states. Word has length 25 [2018-06-22 11:05:22,846 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:22,847 INFO ]: With dead ends: 32 [2018-06-22 11:05:22,847 INFO ]: Without dead ends: 30 [2018-06-22 11:05:22,848 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:05:22,848 INFO ]: Start minimizeSevpa. Operand 30 states. [2018-06-22 11:05:22,855 INFO ]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-06-22 11:05:22,855 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:05:22,856 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-06-22 11:05:22,856 INFO ]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2018-06-22 11:05:22,856 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:22,856 INFO ]: Abstraction has 30 states and 34 transitions. [2018-06-22 11:05:22,856 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:05:22,856 INFO ]: Start isEmpty. Operand 30 states and 34 transitions. [2018-06-22 11:05:22,857 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:05:22,857 INFO ]: Found error trace [2018-06-22 11:05:22,858 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:22,858 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:22,858 INFO ]: Analyzing trace with hash -674748700, now seen corresponding path program 2 times [2018-06-22 11:05:22,858 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:22,858 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:22,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:22,859 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:22,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:22,872 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:23,384 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:05:23,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:23,384 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 11:05:23,398 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:23,447 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:23,447 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:23,450 INFO ]: Computing forward predicates... [2018-06-22 11:05:23,582 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:05:23,615 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:23,615 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 11:05:23,615 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:05:23,615 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:05:23,615 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:05:23,615 INFO ]: Start difference. First operand 30 states and 34 transitions. Second operand 10 states. [2018-06-22 11:05:23,900 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:23,900 INFO ]: Finished difference Result 32 states and 36 transitions. [2018-06-22 11:05:23,901 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:05:23,901 INFO ]: Start accepts. Automaton has 10 states. Word has length 29 [2018-06-22 11:05:23,902 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:23,903 INFO ]: With dead ends: 32 [2018-06-22 11:05:23,903 INFO ]: Without dead ends: 32 [2018-06-22 11:05:23,903 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:05:23,903 INFO ]: Start minimizeSevpa. Operand 32 states. [2018-06-22 11:05:23,907 INFO ]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-06-22 11:05:23,907 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 11:05:23,908 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-06-22 11:05:23,908 INFO ]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 29 [2018-06-22 11:05:23,909 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:23,909 INFO ]: Abstraction has 28 states and 31 transitions. [2018-06-22 11:05:23,909 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:05:23,909 INFO ]: Start isEmpty. Operand 28 states and 31 transitions. [2018-06-22 11:05:23,909 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:05:23,909 INFO ]: Found error trace [2018-06-22 11:05:23,909 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:23,909 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:23,909 INFO ]: Analyzing trace with hash 161020996, now seen corresponding path program 1 times [2018-06-22 11:05:23,910 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:23,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:23,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:23,910 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:23,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:23,924 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:24,080 INFO ]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 11:05:24,080 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:24,080 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 11:05:24,088 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:24,109 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:24,112 INFO ]: Computing forward predicates... [2018-06-22 11:05:24,287 INFO ]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 11:05:24,307 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:24,308 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 11:05:24,308 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:05:24,308 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:05:24,308 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:05:24,308 INFO ]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2018-06-22 11:05:24,519 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:24,519 INFO ]: Finished difference Result 32 states and 35 transitions. [2018-06-22 11:05:24,525 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 11:05:24,525 INFO ]: Start accepts. Automaton has 9 states. Word has length 29 [2018-06-22 11:05:24,525 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:24,526 INFO ]: With dead ends: 32 [2018-06-22 11:05:24,526 INFO ]: Without dead ends: 30 [2018-06-22 11:05:24,526 INFO ]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:05:24,526 INFO ]: Start minimizeSevpa. Operand 30 states. [2018-06-22 11:05:24,530 INFO ]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-06-22 11:05:24,530 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:05:24,531 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-06-22 11:05:24,531 INFO ]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 29 [2018-06-22 11:05:24,531 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:24,531 INFO ]: Abstraction has 30 states and 33 transitions. [2018-06-22 11:05:24,531 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:05:24,531 INFO ]: Start isEmpty. Operand 30 states and 33 transitions. [2018-06-22 11:05:24,532 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:05:24,532 INFO ]: Found error trace [2018-06-22 11:05:24,532 INFO ]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:24,533 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:24,533 INFO ]: Analyzing trace with hash 510955945, now seen corresponding path program 2 times [2018-06-22 11:05:24,533 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:24,533 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:24,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:24,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:24,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:24,559 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:24,792 INFO ]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:05:24,792 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:24,792 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 11:05:24,807 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:24,840 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:24,840 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:24,843 INFO ]: Computing forward predicates... [2018-06-22 11:05:25,049 INFO ]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:05:25,083 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:25,083 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-06-22 11:05:25,084 INFO ]: Interpolant automaton has 17 states [2018-06-22 11:05:25,084 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 11:05:25,084 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:05:25,084 INFO ]: Start difference. First operand 30 states and 33 transitions. Second operand 17 states. [2018-06-22 11:05:26,392 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:26,392 INFO ]: Finished difference Result 38 states and 42 transitions. [2018-06-22 11:05:26,392 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:05:26,393 INFO ]: Start accepts. Automaton has 17 states. Word has length 33 [2018-06-22 11:05:26,393 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:26,394 INFO ]: With dead ends: 38 [2018-06-22 11:05:26,394 INFO ]: Without dead ends: 36 [2018-06-22 11:05:26,394 INFO ]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:05:26,394 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 11:05:26,399 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-06-22 11:05:26,399 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 11:05:26,400 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-06-22 11:05:26,400 INFO ]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 33 [2018-06-22 11:05:26,400 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:26,400 INFO ]: Abstraction has 34 states and 38 transitions. [2018-06-22 11:05:26,400 INFO ]: Interpolant automaton has 17 states. [2018-06-22 11:05:26,400 INFO ]: Start isEmpty. Operand 34 states and 38 transitions. [2018-06-22 11:05:26,401 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 11:05:26,402 INFO ]: Found error trace [2018-06-22 11:05:26,402 INFO ]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:26,402 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:26,403 INFO ]: Analyzing trace with hash -485919794, now seen corresponding path program 3 times [2018-06-22 11:05:26,403 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:26,403 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:26,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:26,404 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:26,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:26,425 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:26,553 INFO ]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:05:26,553 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:26,553 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 11:05:26,559 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:26,576 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 11:05:26,576 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:26,579 INFO ]: Computing forward predicates... [2018-06-22 11:05:26,606 INFO ]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:05:26,626 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:26,626 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-06-22 11:05:26,627 INFO ]: Interpolant automaton has 13 states [2018-06-22 11:05:26,627 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 11:05:26,627 INFO ]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:05:26,627 INFO ]: Start difference. First operand 34 states and 38 transitions. Second operand 13 states. [2018-06-22 11:05:26,784 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:26,784 INFO ]: Finished difference Result 38 states and 42 transitions. [2018-06-22 11:05:26,784 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:05:26,784 INFO ]: Start accepts. Automaton has 13 states. Word has length 37 [2018-06-22 11:05:26,785 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:26,786 INFO ]: With dead ends: 38 [2018-06-22 11:05:26,786 INFO ]: Without dead ends: 38 [2018-06-22 11:05:26,786 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:05:26,786 INFO ]: Start minimizeSevpa. Operand 38 states. [2018-06-22 11:05:26,790 INFO ]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-06-22 11:05:26,790 INFO ]: Start removeUnreachable. Operand 32 states. [2018-06-22 11:05:26,791 INFO ]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-06-22 11:05:26,791 INFO ]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 37 [2018-06-22 11:05:26,791 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:26,791 INFO ]: Abstraction has 32 states and 35 transitions. [2018-06-22 11:05:26,791 INFO ]: Interpolant automaton has 13 states. [2018-06-22 11:05:26,791 INFO ]: Start isEmpty. Operand 32 states and 35 transitions. [2018-06-22 11:05:26,792 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 11:05:26,792 INFO ]: Found error trace [2018-06-22 11:05:26,792 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:26,793 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:26,793 INFO ]: Analyzing trace with hash -1313363026, now seen corresponding path program 4 times [2018-06-22 11:05:26,793 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:26,793 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:26,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:26,794 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:26,794 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:26,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:26,902 INFO ]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:05:26,902 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:26,902 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 11:05:26,909 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:26,925 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:26,925 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:26,928 INFO ]: Computing forward predicates... [2018-06-22 11:05:26,953 INFO ]: Checked inductivity of 20 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:05:26,974 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:26,974 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2018-06-22 11:05:26,974 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:05:26,974 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:05:26,974 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:05:26,974 INFO ]: Start difference. First operand 32 states and 35 transitions. Second operand 12 states. [2018-06-22 11:05:27,129 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:27,129 INFO ]: Finished difference Result 38 states and 41 transitions. [2018-06-22 11:05:27,130 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:05:27,130 INFO ]: Start accepts. Automaton has 12 states. Word has length 37 [2018-06-22 11:05:27,130 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:27,131 INFO ]: With dead ends: 38 [2018-06-22 11:05:27,131 INFO ]: Without dead ends: 34 [2018-06-22 11:05:27,131 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:05:27,132 INFO ]: Start minimizeSevpa. Operand 34 states. [2018-06-22 11:05:27,136 INFO ]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-06-22 11:05:27,136 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 11:05:27,137 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-06-22 11:05:27,137 INFO ]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 37 [2018-06-22 11:05:27,138 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:27,138 INFO ]: Abstraction has 34 states and 37 transitions. [2018-06-22 11:05:27,138 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:05:27,138 INFO ]: Start isEmpty. Operand 34 states and 37 transitions. [2018-06-22 11:05:27,139 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:05:27,139 INFO ]: Found error trace [2018-06-22 11:05:27,140 INFO ]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:27,140 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:27,140 INFO ]: Analyzing trace with hash -1381456621, now seen corresponding path program 5 times [2018-06-22 11:05:27,140 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:27,140 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:27,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:27,141 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:27,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:27,154 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:27,372 INFO ]: Checked inductivity of 31 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:05:27,372 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:27,372 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 11:05:27,381 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:05:27,445 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 11:05:27,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:27,449 INFO ]: Computing forward predicates... [2018-06-22 11:05:28,046 INFO ]: Checked inductivity of 31 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:05:28,065 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:28,065 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-06-22 11:05:28,066 INFO ]: Interpolant automaton has 21 states [2018-06-22 11:05:28,066 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 11:05:28,066 INFO ]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:05:28,066 INFO ]: Start difference. First operand 34 states and 37 transitions. Second operand 21 states. [2018-06-22 11:05:28,350 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:28,350 INFO ]: Finished difference Result 44 states and 48 transitions. [2018-06-22 11:05:28,350 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 11:05:28,350 INFO ]: Start accepts. Automaton has 21 states. Word has length 41 [2018-06-22 11:05:28,350 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:28,351 INFO ]: With dead ends: 44 [2018-06-22 11:05:28,351 INFO ]: Without dead ends: 42 [2018-06-22 11:05:28,351 INFO ]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2018-06-22 11:05:28,351 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-22 11:05:28,355 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-06-22 11:05:28,355 INFO ]: Start removeUnreachable. Operand 38 states. [2018-06-22 11:05:28,356 INFO ]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-06-22 11:05:28,356 INFO ]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 41 [2018-06-22 11:05:28,356 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:28,356 INFO ]: Abstraction has 38 states and 42 transitions. [2018-06-22 11:05:28,356 INFO ]: Interpolant automaton has 21 states. [2018-06-22 11:05:28,356 INFO ]: Start isEmpty. Operand 38 states and 42 transitions. [2018-06-22 11:05:28,357 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 11:05:28,357 INFO ]: Found error trace [2018-06-22 11:05:28,357 INFO ]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:28,358 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:28,358 INFO ]: Analyzing trace with hash 1542146872, now seen corresponding path program 6 times [2018-06-22 11:05:28,358 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:28,358 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:28,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:28,358 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:28,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:28,370 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:28,547 INFO ]: Checked inductivity of 46 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 11:05:28,547 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:28,547 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 11:05:28,554 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:05:28,573 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 11:05:28,573 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:28,576 INFO ]: Computing forward predicates... [2018-06-22 11:05:28,615 INFO ]: Checked inductivity of 46 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 11:05:28,635 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:28,635 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2018-06-22 11:05:28,635 INFO ]: Interpolant automaton has 15 states [2018-06-22 11:05:28,635 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 11:05:28,635 INFO ]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:05:28,636 INFO ]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2018-06-22 11:05:28,822 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:28,822 INFO ]: Finished difference Result 44 states and 48 transitions. [2018-06-22 11:05:28,824 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 11:05:28,824 INFO ]: Start accepts. Automaton has 15 states. Word has length 45 [2018-06-22 11:05:28,824 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:28,825 INFO ]: With dead ends: 44 [2018-06-22 11:05:28,825 INFO ]: Without dead ends: 44 [2018-06-22 11:05:28,825 INFO ]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:05:28,825 INFO ]: Start minimizeSevpa. Operand 44 states. [2018-06-22 11:05:28,830 INFO ]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-06-22 11:05:28,830 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-22 11:05:28,831 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-06-22 11:05:28,831 INFO ]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 45 [2018-06-22 11:05:28,831 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:28,831 INFO ]: Abstraction has 36 states and 39 transitions. [2018-06-22 11:05:28,831 INFO ]: Interpolant automaton has 15 states. [2018-06-22 11:05:28,831 INFO ]: Start isEmpty. Operand 36 states and 39 transitions. [2018-06-22 11:05:28,832 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 11:05:28,832 INFO ]: Found error trace [2018-06-22 11:05:28,832 INFO ]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:28,832 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:28,832 INFO ]: Analyzing trace with hash -1603115624, now seen corresponding path program 7 times [2018-06-22 11:05:28,832 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:28,832 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:28,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:28,834 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:28,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:28,845 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:28,972 INFO ]: Checked inductivity of 42 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-06-22 11:05:28,972 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:28,972 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 11:05:28,984 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:29,002 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:29,006 INFO ]: Computing forward predicates... [2018-06-22 11:05:29,041 INFO ]: Checked inductivity of 42 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 11:05:29,066 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:29,066 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2018-06-22 11:05:29,066 INFO ]: Interpolant automaton has 14 states [2018-06-22 11:05:29,066 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 11:05:29,067 INFO ]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:05:29,067 INFO ]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2018-06-22 11:05:29,320 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:29,320 INFO ]: Finished difference Result 44 states and 47 transitions. [2018-06-22 11:05:29,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 11:05:29,320 INFO ]: Start accepts. Automaton has 14 states. Word has length 45 [2018-06-22 11:05:29,321 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:29,321 INFO ]: With dead ends: 44 [2018-06-22 11:05:29,321 INFO ]: Without dead ends: 38 [2018-06-22 11:05:29,322 INFO ]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:05:29,322 INFO ]: Start minimizeSevpa. Operand 38 states. [2018-06-22 11:05:29,325 INFO ]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-06-22 11:05:29,325 INFO ]: Start removeUnreachable. Operand 38 states. [2018-06-22 11:05:29,326 INFO ]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-06-22 11:05:29,326 INFO ]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 45 [2018-06-22 11:05:29,326 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:29,326 INFO ]: Abstraction has 38 states and 41 transitions. [2018-06-22 11:05:29,326 INFO ]: Interpolant automaton has 14 states. [2018-06-22 11:05:29,326 INFO ]: Start isEmpty. Operand 38 states and 41 transitions. [2018-06-22 11:05:29,327 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 11:05:29,327 INFO ]: Found error trace [2018-06-22 11:05:29,327 INFO ]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:29,327 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:29,327 INFO ]: Analyzing trace with hash 1562092285, now seen corresponding path program 8 times [2018-06-22 11:05:29,328 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:29,328 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:29,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:29,328 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:29,328 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:29,341 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:29,546 INFO ]: Checked inductivity of 57 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-06-22 11:05:29,546 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:29,546 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:29,554 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:29,591 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:29,591 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:29,594 INFO ]: Computing forward predicates... [2018-06-22 11:05:30,232 INFO ]: Checked inductivity of 57 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-06-22 11:05:30,255 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:30,255 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2018-06-22 11:05:30,255 INFO ]: Interpolant automaton has 25 states [2018-06-22 11:05:30,255 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 11:05:30,256 INFO ]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:05:30,256 INFO ]: Start difference. First operand 38 states and 41 transitions. Second operand 25 states. [2018-06-22 11:05:30,667 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:30,667 INFO ]: Finished difference Result 50 states and 54 transitions. [2018-06-22 11:05:30,667 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:05:30,667 INFO ]: Start accepts. Automaton has 25 states. Word has length 49 [2018-06-22 11:05:30,668 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:30,670 INFO ]: With dead ends: 50 [2018-06-22 11:05:30,670 INFO ]: Without dead ends: 48 [2018-06-22 11:05:30,670 INFO ]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:05:30,670 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-22 11:05:30,676 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-06-22 11:05:30,677 INFO ]: Start removeUnreachable. Operand 42 states. [2018-06-22 11:05:30,677 INFO ]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-06-22 11:05:30,677 INFO ]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 49 [2018-06-22 11:05:30,677 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:30,677 INFO ]: Abstraction has 42 states and 46 transitions. [2018-06-22 11:05:30,677 INFO ]: Interpolant automaton has 25 states. [2018-06-22 11:05:30,677 INFO ]: Start isEmpty. Operand 42 states and 46 transitions. [2018-06-22 11:05:30,678 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 11:05:30,678 INFO ]: Found error trace [2018-06-22 11:05:30,678 INFO ]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:30,678 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:30,678 INFO ]: Analyzing trace with hash -972100318, now seen corresponding path program 9 times [2018-06-22 11:05:30,678 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:30,678 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:30,679 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:30,679 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:30,679 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:30,689 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:30,893 INFO ]: Checked inductivity of 76 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 11:05:30,894 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:30,894 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 11:05:30,899 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:30,923 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-22 11:05:30,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:30,925 INFO ]: Computing forward predicates... [2018-06-22 11:05:30,954 INFO ]: Checked inductivity of 76 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-06-22 11:05:30,987 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:30,987 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2018-06-22 11:05:30,987 INFO ]: Interpolant automaton has 17 states [2018-06-22 11:05:30,987 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 11:05:30,988 INFO ]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:05:30,988 INFO ]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2018-06-22 11:05:31,246 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:31,246 INFO ]: Finished difference Result 50 states and 54 transitions. [2018-06-22 11:05:31,247 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:05:31,247 INFO ]: Start accepts. Automaton has 17 states. Word has length 53 [2018-06-22 11:05:31,247 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:31,248 INFO ]: With dead ends: 50 [2018-06-22 11:05:31,248 INFO ]: Without dead ends: 50 [2018-06-22 11:05:31,248 INFO ]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2018-06-22 11:05:31,248 INFO ]: Start minimizeSevpa. Operand 50 states. [2018-06-22 11:05:31,254 INFO ]: Finished minimizeSevpa. Reduced states from 50 to 40. [2018-06-22 11:05:31,254 INFO ]: Start removeUnreachable. Operand 40 states. [2018-06-22 11:05:31,255 INFO ]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-06-22 11:05:31,255 INFO ]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 53 [2018-06-22 11:05:31,256 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:31,256 INFO ]: Abstraction has 40 states and 43 transitions. [2018-06-22 11:05:31,256 INFO ]: Interpolant automaton has 17 states. [2018-06-22 11:05:31,256 INFO ]: Start isEmpty. Operand 40 states and 43 transitions. [2018-06-22 11:05:31,256 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 11:05:31,256 INFO ]: Found error trace [2018-06-22 11:05:31,256 INFO ]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:31,256 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:31,257 INFO ]: Analyzing trace with hash 275933698, now seen corresponding path program 10 times [2018-06-22 11:05:31,257 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:31,257 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:31,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:31,257 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:31,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:31,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:32,360 INFO ]: Checked inductivity of 72 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-06-22 11:05:32,360 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:32,360 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 11:05:32,367 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:32,388 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:32,388 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:32,391 INFO ]: Computing forward predicates... [2018-06-22 11:05:32,464 INFO ]: Checked inductivity of 72 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-06-22 11:05:32,497 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:32,497 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2018-06-22 11:05:32,497 INFO ]: Interpolant automaton has 16 states [2018-06-22 11:05:32,497 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 11:05:32,498 INFO ]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:05:32,498 INFO ]: Start difference. First operand 40 states and 43 transitions. Second operand 16 states. [2018-06-22 11:05:32,741 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:32,741 INFO ]: Finished difference Result 50 states and 53 transitions. [2018-06-22 11:05:32,742 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:05:32,742 INFO ]: Start accepts. Automaton has 16 states. Word has length 53 [2018-06-22 11:05:32,742 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:32,743 INFO ]: With dead ends: 50 [2018-06-22 11:05:32,743 INFO ]: Without dead ends: 42 [2018-06-22 11:05:32,743 INFO ]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2018-06-22 11:05:32,743 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-22 11:05:32,746 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-06-22 11:05:32,746 INFO ]: Start removeUnreachable. Operand 42 states. [2018-06-22 11:05:32,746 INFO ]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2018-06-22 11:05:32,747 INFO ]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 53 [2018-06-22 11:05:32,747 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:32,747 INFO ]: Abstraction has 42 states and 45 transitions. [2018-06-22 11:05:32,747 INFO ]: Interpolant automaton has 16 states. [2018-06-22 11:05:32,747 INFO ]: Start isEmpty. Operand 42 states and 45 transitions. [2018-06-22 11:05:32,748 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 11:05:32,748 INFO ]: Found error trace [2018-06-22 11:05:32,748 INFO ]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:32,748 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:32,748 INFO ]: Analyzing trace with hash -971060377, now seen corresponding path program 11 times [2018-06-22 11:05:32,748 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:32,748 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:32,748 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:32,748 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:32,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:32,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:32,990 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 11:05:33,146 INFO ]: Checked inductivity of 91 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-06-22 11:05:33,146 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:33,146 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 11:05:33,164 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:33,245 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 11:05:33,245 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:33,249 INFO ]: Computing forward predicates... [2018-06-22 11:05:33,649 INFO ]: Checked inductivity of 91 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-06-22 11:05:33,683 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:33,683 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2018-06-22 11:05:33,684 INFO ]: Interpolant automaton has 29 states [2018-06-22 11:05:33,684 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 11:05:33,684 INFO ]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:05:33,684 INFO ]: Start difference. First operand 42 states and 45 transitions. Second operand 29 states. [2018-06-22 11:05:34,157 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:34,157 INFO ]: Finished difference Result 56 states and 60 transitions. [2018-06-22 11:05:34,157 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:05:34,157 INFO ]: Start accepts. Automaton has 29 states. Word has length 57 [2018-06-22 11:05:34,157 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:34,158 INFO ]: With dead ends: 56 [2018-06-22 11:05:34,158 INFO ]: Without dead ends: 54 [2018-06-22 11:05:34,159 INFO ]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 11:05:34,159 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-22 11:05:34,163 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 46. [2018-06-22 11:05:34,163 INFO ]: Start removeUnreachable. Operand 46 states. [2018-06-22 11:05:34,164 INFO ]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-06-22 11:05:34,164 INFO ]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 57 [2018-06-22 11:05:34,164 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:34,164 INFO ]: Abstraction has 46 states and 50 transitions. [2018-06-22 11:05:34,164 INFO ]: Interpolant automaton has 29 states. [2018-06-22 11:05:34,164 INFO ]: Start isEmpty. Operand 46 states and 50 transitions. [2018-06-22 11:05:34,165 INFO ]: Finished isEmpty. Found accepting run of length 62 [2018-06-22 11:05:34,165 INFO ]: Found error trace [2018-06-22 11:05:34,165 INFO ]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:34,165 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:34,165 INFO ]: Analyzing trace with hash 493721996, now seen corresponding path program 12 times [2018-06-22 11:05:34,165 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:34,165 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:34,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:34,166 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:34,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:34,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:34,396 INFO ]: Checked inductivity of 114 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-06-22 11:05:34,396 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:34,396 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:34,402 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:05:34,457 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 11:05:34,457 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:34,460 INFO ]: Computing forward predicates... [2018-06-22 11:05:34,501 INFO ]: Checked inductivity of 114 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-06-22 11:05:34,525 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:34,525 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2018-06-22 11:05:34,525 INFO ]: Interpolant automaton has 19 states [2018-06-22 11:05:34,525 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 11:05:34,525 INFO ]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-06-22 11:05:34,525 INFO ]: Start difference. First operand 46 states and 50 transitions. Second operand 19 states. [2018-06-22 11:05:34,767 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:34,767 INFO ]: Finished difference Result 56 states and 60 transitions. [2018-06-22 11:05:34,767 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:05:34,767 INFO ]: Start accepts. Automaton has 19 states. Word has length 61 [2018-06-22 11:05:34,767 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:34,768 INFO ]: With dead ends: 56 [2018-06-22 11:05:34,768 INFO ]: Without dead ends: 56 [2018-06-22 11:05:34,769 INFO ]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2018-06-22 11:05:34,769 INFO ]: Start minimizeSevpa. Operand 56 states. [2018-06-22 11:05:34,776 INFO ]: Finished minimizeSevpa. Reduced states from 56 to 44. [2018-06-22 11:05:34,776 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-22 11:05:34,777 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-06-22 11:05:34,777 INFO ]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 61 [2018-06-22 11:05:34,777 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:34,777 INFO ]: Abstraction has 44 states and 47 transitions. [2018-06-22 11:05:34,777 INFO ]: Interpolant automaton has 19 states. [2018-06-22 11:05:34,777 INFO ]: Start isEmpty. Operand 44 states and 47 transitions. [2018-06-22 11:05:34,778 INFO ]: Finished isEmpty. Found accepting run of length 62 [2018-06-22 11:05:34,778 INFO ]: Found error trace [2018-06-22 11:05:34,778 INFO ]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:34,778 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:34,778 INFO ]: Analyzing trace with hash -2068252436, now seen corresponding path program 13 times [2018-06-22 11:05:34,778 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:34,778 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:34,779 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:34,779 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:34,779 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:34,788 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:34,927 INFO ]: Checked inductivity of 110 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-06-22 11:05:34,927 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:34,927 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:34,933 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:34,963 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:34,966 INFO ]: Computing forward predicates... [2018-06-22 11:05:35,002 INFO ]: Checked inductivity of 110 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-06-22 11:05:35,027 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:35,027 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2018-06-22 11:05:35,027 INFO ]: Interpolant automaton has 18 states [2018-06-22 11:05:35,027 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 11:05:35,027 INFO ]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:05:35,027 INFO ]: Start difference. First operand 44 states and 47 transitions. Second operand 18 states. [2018-06-22 11:05:35,266 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:35,266 INFO ]: Finished difference Result 56 states and 59 transitions. [2018-06-22 11:05:35,266 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:05:35,267 INFO ]: Start accepts. Automaton has 18 states. Word has length 61 [2018-06-22 11:05:35,267 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:35,267 INFO ]: With dead ends: 56 [2018-06-22 11:05:35,267 INFO ]: Without dead ends: 46 [2018-06-22 11:05:35,268 INFO ]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2018-06-22 11:05:35,268 INFO ]: Start minimizeSevpa. Operand 46 states. [2018-06-22 11:05:35,271 INFO ]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-06-22 11:05:35,271 INFO ]: Start removeUnreachable. Operand 46 states. [2018-06-22 11:05:35,272 INFO ]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2018-06-22 11:05:35,272 INFO ]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 61 [2018-06-22 11:05:35,272 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:35,272 INFO ]: Abstraction has 46 states and 49 transitions. [2018-06-22 11:05:35,272 INFO ]: Interpolant automaton has 18 states. [2018-06-22 11:05:35,272 INFO ]: Start isEmpty. Operand 46 states and 49 transitions. [2018-06-22 11:05:35,273 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-22 11:05:35,273 INFO ]: Found error trace [2018-06-22 11:05:35,273 INFO ]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:35,273 INFO ]: === Iteration 17 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:35,273 INFO ]: Analyzing trace with hash 1146838609, now seen corresponding path program 14 times [2018-06-22 11:05:35,273 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:35,273 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:35,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:35,274 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:35,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:35,285 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:35,472 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 11:05:35,737 INFO ]: Checked inductivity of 133 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 11:05:35,737 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:35,737 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:35,746 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:35,774 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:35,774 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:35,778 INFO ]: Computing forward predicates... [2018-06-22 11:05:36,494 INFO ]: Checked inductivity of 133 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 11:05:36,513 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:36,513 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2018-06-22 11:05:36,514 INFO ]: Interpolant automaton has 33 states [2018-06-22 11:05:36,514 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 11:05:36,514 INFO ]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 11:05:36,514 INFO ]: Start difference. First operand 46 states and 49 transitions. Second operand 33 states. [2018-06-22 11:05:37,115 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:37,115 INFO ]: Finished difference Result 62 states and 66 transitions. [2018-06-22 11:05:37,115 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:05:37,115 INFO ]: Start accepts. Automaton has 33 states. Word has length 65 [2018-06-22 11:05:37,115 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:37,116 INFO ]: With dead ends: 62 [2018-06-22 11:05:37,116 INFO ]: Without dead ends: 60 [2018-06-22 11:05:37,117 INFO ]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=132, Invalid=1760, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 11:05:37,117 INFO ]: Start minimizeSevpa. Operand 60 states. [2018-06-22 11:05:37,120 INFO ]: Finished minimizeSevpa. Reduced states from 60 to 50. [2018-06-22 11:05:37,120 INFO ]: Start removeUnreachable. Operand 50 states. [2018-06-22 11:05:37,121 INFO ]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-06-22 11:05:37,121 INFO ]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 65 [2018-06-22 11:05:37,121 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:37,121 INFO ]: Abstraction has 50 states and 54 transitions. [2018-06-22 11:05:37,121 INFO ]: Interpolant automaton has 33 states. [2018-06-22 11:05:37,121 INFO ]: Start isEmpty. Operand 50 states and 54 transitions. [2018-06-22 11:05:37,122 INFO ]: Finished isEmpty. Found accepting run of length 70 [2018-06-22 11:05:37,122 INFO ]: Found error trace [2018-06-22 11:05:37,122 INFO ]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:37,122 INFO ]: === Iteration 18 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:37,122 INFO ]: Analyzing trace with hash -1705471882, now seen corresponding path program 15 times [2018-06-22 11:05:37,122 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:37,122 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:37,125 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:37,125 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:37,125 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:37,135 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:37,978 INFO ]: Checked inductivity of 160 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-06-22 11:05:37,978 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:37,978 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:37,984 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:38,075 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-06-22 11:05:38,075 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:38,078 INFO ]: Computing forward predicates... [2018-06-22 11:05:38,153 INFO ]: Checked inductivity of 160 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-06-22 11:05:38,173 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:38,173 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2018-06-22 11:05:38,173 INFO ]: Interpolant automaton has 21 states [2018-06-22 11:05:38,173 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 11:05:38,174 INFO ]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:05:38,174 INFO ]: Start difference. First operand 50 states and 54 transitions. Second operand 21 states. [2018-06-22 11:05:38,530 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:38,530 INFO ]: Finished difference Result 62 states and 66 transitions. [2018-06-22 11:05:38,530 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:05:38,530 INFO ]: Start accepts. Automaton has 21 states. Word has length 69 [2018-06-22 11:05:38,530 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:38,531 INFO ]: With dead ends: 62 [2018-06-22 11:05:38,531 INFO ]: Without dead ends: 62 [2018-06-22 11:05:38,531 INFO ]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 11:05:38,531 INFO ]: Start minimizeSevpa. Operand 62 states. [2018-06-22 11:05:38,539 INFO ]: Finished minimizeSevpa. Reduced states from 62 to 48. [2018-06-22 11:05:38,539 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-22 11:05:38,540 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-06-22 11:05:38,540 INFO ]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 69 [2018-06-22 11:05:38,540 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:38,540 INFO ]: Abstraction has 48 states and 51 transitions. [2018-06-22 11:05:38,540 INFO ]: Interpolant automaton has 21 states. [2018-06-22 11:05:38,540 INFO ]: Start isEmpty. Operand 48 states and 51 transitions. [2018-06-22 11:05:38,541 INFO ]: Finished isEmpty. Found accepting run of length 70 [2018-06-22 11:05:38,541 INFO ]: Found error trace [2018-06-22 11:05:38,541 INFO ]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:38,541 INFO ]: === Iteration 19 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:38,541 INFO ]: Analyzing trace with hash 211767894, now seen corresponding path program 16 times [2018-06-22 11:05:38,541 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:38,541 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:38,542 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:38,542 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:38,542 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:38,551 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:38,720 INFO ]: Checked inductivity of 156 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-06-22 11:05:38,720 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:38,720 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:38,730 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:38,757 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:38,757 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:38,759 INFO ]: Computing forward predicates... [2018-06-22 11:05:38,901 INFO ]: Checked inductivity of 156 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-06-22 11:05:38,934 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:38,934 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2018-06-22 11:05:38,935 INFO ]: Interpolant automaton has 20 states [2018-06-22 11:05:38,935 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 11:05:38,935 INFO ]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:05:38,935 INFO ]: Start difference. First operand 48 states and 51 transitions. Second operand 20 states. [2018-06-22 11:05:39,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:39,238 INFO ]: Finished difference Result 62 states and 65 transitions. [2018-06-22 11:05:39,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:05:39,238 INFO ]: Start accepts. Automaton has 20 states. Word has length 69 [2018-06-22 11:05:39,239 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:39,239 INFO ]: With dead ends: 62 [2018-06-22 11:05:39,239 INFO ]: Without dead ends: 50 [2018-06-22 11:05:39,240 INFO ]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 11:05:39,240 INFO ]: Start minimizeSevpa. Operand 50 states. [2018-06-22 11:05:39,243 INFO ]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-06-22 11:05:39,243 INFO ]: Start removeUnreachable. Operand 50 states. [2018-06-22 11:05:39,244 INFO ]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-06-22 11:05:39,244 INFO ]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 69 [2018-06-22 11:05:39,244 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:39,244 INFO ]: Abstraction has 50 states and 53 transitions. [2018-06-22 11:05:39,244 INFO ]: Interpolant automaton has 20 states. [2018-06-22 11:05:39,244 INFO ]: Start isEmpty. Operand 50 states and 53 transitions. [2018-06-22 11:05:39,245 INFO ]: Finished isEmpty. Found accepting run of length 74 [2018-06-22 11:05:39,245 INFO ]: Found error trace [2018-06-22 11:05:39,245 INFO ]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:39,245 INFO ]: === Iteration 20 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:39,245 INFO ]: Analyzing trace with hash -1177379909, now seen corresponding path program 17 times [2018-06-22 11:05:39,245 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:39,245 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:39,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:39,247 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:39,247 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:39,259 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:39,679 INFO ]: Checked inductivity of 183 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-06-22 11:05:39,679 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:39,679 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:39,684 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:05:39,720 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 11:05:39,720 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:39,724 INFO ]: Computing forward predicates... [2018-06-22 11:05:40,187 INFO ]: Checked inductivity of 183 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-06-22 11:05:40,213 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:40,213 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2018-06-22 11:05:40,213 INFO ]: Interpolant automaton has 37 states [2018-06-22 11:05:40,214 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 11:05:40,214 INFO ]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:05:40,214 INFO ]: Start difference. First operand 50 states and 53 transitions. Second operand 37 states. [2018-06-22 11:05:40,780 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:40,780 INFO ]: Finished difference Result 68 states and 72 transitions. [2018-06-22 11:05:40,781 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:05:40,781 INFO ]: Start accepts. Automaton has 37 states. Word has length 73 [2018-06-22 11:05:40,781 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:40,781 INFO ]: With dead ends: 68 [2018-06-22 11:05:40,781 INFO ]: Without dead ends: 66 [2018-06-22 11:05:40,782 INFO ]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=2298, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 11:05:40,782 INFO ]: Start minimizeSevpa. Operand 66 states. [2018-06-22 11:05:40,786 INFO ]: Finished minimizeSevpa. Reduced states from 66 to 54. [2018-06-22 11:05:40,786 INFO ]: Start removeUnreachable. Operand 54 states. [2018-06-22 11:05:40,786 INFO ]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-06-22 11:05:40,787 INFO ]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 73 [2018-06-22 11:05:40,787 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:40,787 INFO ]: Abstraction has 54 states and 58 transitions. [2018-06-22 11:05:40,787 INFO ]: Interpolant automaton has 37 states. [2018-06-22 11:05:40,787 INFO ]: Start isEmpty. Operand 54 states and 58 transitions. [2018-06-22 11:05:40,788 INFO ]: Finished isEmpty. Found accepting run of length 78 [2018-06-22 11:05:40,788 INFO ]: Found error trace [2018-06-22 11:05:40,788 INFO ]: trace histogram [9, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:40,788 INFO ]: === Iteration 21 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:40,788 INFO ]: Analyzing trace with hash -176614944, now seen corresponding path program 18 times [2018-06-22 11:05:40,788 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:40,788 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:40,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:40,789 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:40,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:40,800 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:41,349 INFO ]: Checked inductivity of 214 backedges. 56 proven. 70 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-06-22 11:05:41,349 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:41,349 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:41,358 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:05:41,396 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-22 11:05:41,396 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:41,399 INFO ]: Computing forward predicates... [2018-06-22 11:05:41,449 INFO ]: Checked inductivity of 214 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-06-22 11:05:41,470 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:41,470 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2018-06-22 11:05:41,470 INFO ]: Interpolant automaton has 23 states [2018-06-22 11:05:41,471 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 11:05:41,471 INFO ]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2018-06-22 11:05:41,471 INFO ]: Start difference. First operand 54 states and 58 transitions. Second operand 23 states. [2018-06-22 11:05:42,004 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:42,004 INFO ]: Finished difference Result 68 states and 72 transitions. [2018-06-22 11:05:42,005 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:05:42,005 INFO ]: Start accepts. Automaton has 23 states. Word has length 77 [2018-06-22 11:05:42,005 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:42,006 INFO ]: With dead ends: 68 [2018-06-22 11:05:42,006 INFO ]: Without dead ends: 68 [2018-06-22 11:05:42,007 INFO ]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 11:05:42,007 INFO ]: Start minimizeSevpa. Operand 68 states. [2018-06-22 11:05:42,010 INFO ]: Finished minimizeSevpa. Reduced states from 68 to 52. [2018-06-22 11:05:42,010 INFO ]: Start removeUnreachable. Operand 52 states. [2018-06-22 11:05:42,011 INFO ]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2018-06-22 11:05:42,011 INFO ]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 77 [2018-06-22 11:05:42,011 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:42,011 INFO ]: Abstraction has 52 states and 55 transitions. [2018-06-22 11:05:42,011 INFO ]: Interpolant automaton has 23 states. [2018-06-22 11:05:42,011 INFO ]: Start isEmpty. Operand 52 states and 55 transitions. [2018-06-22 11:05:42,012 INFO ]: Finished isEmpty. Found accepting run of length 78 [2018-06-22 11:05:42,012 INFO ]: Found error trace [2018-06-22 11:05:42,012 INFO ]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:42,012 INFO ]: === Iteration 22 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:42,012 INFO ]: Analyzing trace with hash 131511872, now seen corresponding path program 19 times [2018-06-22 11:05:42,012 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:42,012 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:42,013 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:42,013 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:42,013 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:42,024 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:42,385 INFO ]: Checked inductivity of 210 backedges. 56 proven. 68 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-06-22 11:05:42,385 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:42,385 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:42,390 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:42,429 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:42,431 INFO ]: Computing forward predicates... [2018-06-22 11:05:42,484 INFO ]: Checked inductivity of 210 backedges. 56 proven. 62 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-06-22 11:05:42,515 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:42,516 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2018-06-22 11:05:42,516 INFO ]: Interpolant automaton has 22 states [2018-06-22 11:05:42,516 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 11:05:42,516 INFO ]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:05:42,516 INFO ]: Start difference. First operand 52 states and 55 transitions. Second operand 22 states. [2018-06-22 11:05:42,959 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:42,959 INFO ]: Finished difference Result 68 states and 71 transitions. [2018-06-22 11:05:42,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:05:42,960 INFO ]: Start accepts. Automaton has 22 states. Word has length 77 [2018-06-22 11:05:42,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:42,961 INFO ]: With dead ends: 68 [2018-06-22 11:05:42,961 INFO ]: Without dead ends: 54 [2018-06-22 11:05:42,961 INFO ]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 11:05:42,961 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-22 11:05:42,964 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-06-22 11:05:42,964 INFO ]: Start removeUnreachable. Operand 54 states. [2018-06-22 11:05:42,965 INFO ]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2018-06-22 11:05:42,965 INFO ]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 77 [2018-06-22 11:05:42,965 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:42,965 INFO ]: Abstraction has 54 states and 57 transitions. [2018-06-22 11:05:42,965 INFO ]: Interpolant automaton has 22 states. [2018-06-22 11:05:42,965 INFO ]: Start isEmpty. Operand 54 states and 57 transitions. [2018-06-22 11:05:42,966 INFO ]: Finished isEmpty. Found accepting run of length 82 [2018-06-22 11:05:42,966 INFO ]: Found error trace [2018-06-22 11:05:42,966 INFO ]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:42,966 INFO ]: === Iteration 23 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:42,966 INFO ]: Analyzing trace with hash -757218395, now seen corresponding path program 20 times [2018-06-22 11:05:42,966 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:42,966 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:42,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:42,966 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:42,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:42,979 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:43,741 INFO ]: Checked inductivity of 241 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-06-22 11:05:43,741 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:43,741 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:43,747 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:43,781 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:43,781 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:43,785 INFO ]: Computing forward predicates... [2018-06-22 11:05:44,343 INFO ]: Checked inductivity of 241 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-06-22 11:05:44,364 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:44,364 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2018-06-22 11:05:44,365 INFO ]: Interpolant automaton has 41 states [2018-06-22 11:05:44,365 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 11:05:44,365 INFO ]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 11:05:44,365 INFO ]: Start difference. First operand 54 states and 57 transitions. Second operand 41 states. [2018-06-22 11:05:45,091 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:45,092 INFO ]: Finished difference Result 74 states and 78 transitions. [2018-06-22 11:05:45,092 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:05:45,092 INFO ]: Start accepts. Automaton has 41 states. Word has length 81 [2018-06-22 11:05:45,092 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:45,092 INFO ]: With dead ends: 74 [2018-06-22 11:05:45,092 INFO ]: Without dead ends: 72 [2018-06-22 11:05:45,093 INFO ]: 0 DeclaredPredicates, 131 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=2908, Unknown=0, NotChecked=0, Total=3080 [2018-06-22 11:05:45,094 INFO ]: Start minimizeSevpa. Operand 72 states. [2018-06-22 11:05:45,097 INFO ]: Finished minimizeSevpa. Reduced states from 72 to 58. [2018-06-22 11:05:45,097 INFO ]: Start removeUnreachable. Operand 58 states. [2018-06-22 11:05:45,098 INFO ]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-06-22 11:05:45,098 INFO ]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 81 [2018-06-22 11:05:45,100 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:45,100 INFO ]: Abstraction has 58 states and 62 transitions. [2018-06-22 11:05:45,100 INFO ]: Interpolant automaton has 41 states. [2018-06-22 11:05:45,100 INFO ]: Start isEmpty. Operand 58 states and 62 transitions. [2018-06-22 11:05:45,101 INFO ]: Finished isEmpty. Found accepting run of length 86 [2018-06-22 11:05:45,101 INFO ]: Found error trace [2018-06-22 11:05:45,101 INFO ]: trace histogram [10, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:45,101 INFO ]: === Iteration 24 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:45,101 INFO ]: Analyzing trace with hash 735075786, now seen corresponding path program 21 times [2018-06-22 11:05:45,101 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:45,101 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:45,102 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:45,102 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:45,102 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:45,115 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:45,784 INFO ]: Checked inductivity of 276 backedges. 72 proven. 88 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-06-22 11:05:45,784 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:45,784 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:45,789 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:45,833 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 11:05:45,833 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:45,836 INFO ]: Computing forward predicates... [2018-06-22 11:05:45,869 INFO ]: Checked inductivity of 276 backedges. 72 proven. 82 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-06-22 11:05:45,888 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:45,888 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2018-06-22 11:05:45,888 INFO ]: Interpolant automaton has 25 states [2018-06-22 11:05:45,888 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 11:05:45,888 INFO ]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:05:45,889 INFO ]: Start difference. First operand 58 states and 62 transitions. Second operand 25 states. [2018-06-22 11:05:46,378 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:46,378 INFO ]: Finished difference Result 74 states and 78 transitions. [2018-06-22 11:05:46,378 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:05:46,378 INFO ]: Start accepts. Automaton has 25 states. Word has length 85 [2018-06-22 11:05:46,378 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:46,379 INFO ]: With dead ends: 74 [2018-06-22 11:05:46,379 INFO ]: Without dead ends: 74 [2018-06-22 11:05:46,379 INFO ]: 0 DeclaredPredicates, 138 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 11:05:46,379 INFO ]: Start minimizeSevpa. Operand 74 states. [2018-06-22 11:05:46,383 INFO ]: Finished minimizeSevpa. Reduced states from 74 to 56. [2018-06-22 11:05:46,383 INFO ]: Start removeUnreachable. Operand 56 states. [2018-06-22 11:05:46,384 INFO ]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2018-06-22 11:05:46,384 INFO ]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 85 [2018-06-22 11:05:46,384 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:46,384 INFO ]: Abstraction has 56 states and 59 transitions. [2018-06-22 11:05:46,384 INFO ]: Interpolant automaton has 25 states. [2018-06-22 11:05:46,384 INFO ]: Start isEmpty. Operand 56 states and 59 transitions. [2018-06-22 11:05:46,385 INFO ]: Finished isEmpty. Found accepting run of length 86 [2018-06-22 11:05:46,385 INFO ]: Found error trace [2018-06-22 11:05:46,385 INFO ]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:46,385 INFO ]: === Iteration 25 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:46,385 INFO ]: Analyzing trace with hash 1785226410, now seen corresponding path program 22 times [2018-06-22 11:05:46,385 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:46,385 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:46,386 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:46,386 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:46,386 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:46,400 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:46,723 INFO ]: Checked inductivity of 272 backedges. 72 proven. 86 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-06-22 11:05:46,723 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:46,723 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:46,729 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:46,766 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:46,766 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:46,770 INFO ]: Computing forward predicates... [2018-06-22 11:05:46,792 INFO ]: Checked inductivity of 272 backedges. 72 proven. 79 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-06-22 11:05:46,812 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:46,812 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2018-06-22 11:05:46,812 INFO ]: Interpolant automaton has 24 states [2018-06-22 11:05:46,812 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 11:05:46,813 INFO ]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-06-22 11:05:46,813 INFO ]: Start difference. First operand 56 states and 59 transitions. Second operand 24 states. [2018-06-22 11:05:47,144 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:47,144 INFO ]: Finished difference Result 74 states and 77 transitions. [2018-06-22 11:05:47,144 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:05:47,144 INFO ]: Start accepts. Automaton has 24 states. Word has length 85 [2018-06-22 11:05:47,144 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:47,145 INFO ]: With dead ends: 74 [2018-06-22 11:05:47,145 INFO ]: Without dead ends: 58 [2018-06-22 11:05:47,146 INFO ]: 0 DeclaredPredicates, 138 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 11:05:47,146 INFO ]: Start minimizeSevpa. Operand 58 states. [2018-06-22 11:05:47,149 INFO ]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-06-22 11:05:47,149 INFO ]: Start removeUnreachable. Operand 58 states. [2018-06-22 11:05:47,151 INFO ]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2018-06-22 11:05:47,151 INFO ]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 85 [2018-06-22 11:05:47,151 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:47,151 INFO ]: Abstraction has 58 states and 61 transitions. [2018-06-22 11:05:47,151 INFO ]: Interpolant automaton has 24 states. [2018-06-22 11:05:47,151 INFO ]: Start isEmpty. Operand 58 states and 61 transitions. [2018-06-22 11:05:47,152 INFO ]: Finished isEmpty. Found accepting run of length 90 [2018-06-22 11:05:47,152 INFO ]: Found error trace [2018-06-22 11:05:47,152 INFO ]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:47,152 INFO ]: === Iteration 26 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:47,152 INFO ]: Analyzing trace with hash -902949361, now seen corresponding path program 23 times [2018-06-22 11:05:47,152 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:47,152 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:47,152 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:47,152 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:47,152 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:47,163 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:48,023 INFO ]: Checked inductivity of 307 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-06-22 11:05:48,023 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:48,023 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:48,029 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:05:48,073 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-06-22 11:05:48,073 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:48,077 INFO ]: Computing forward predicates... [2018-06-22 11:05:49,386 INFO ]: Checked inductivity of 307 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-06-22 11:05:49,405 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:49,405 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2018-06-22 11:05:49,405 INFO ]: Interpolant automaton has 45 states [2018-06-22 11:05:49,405 INFO ]: Constructing interpolant automaton starting with 45 interpolants. [2018-06-22 11:05:49,405 INFO ]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 11:05:49,405 INFO ]: Start difference. First operand 58 states and 61 transitions. Second operand 45 states. [2018-06-22 11:05:50,089 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:50,090 INFO ]: Finished difference Result 80 states and 84 transitions. [2018-06-22 11:05:50,090 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 11:05:50,090 INFO ]: Start accepts. Automaton has 45 states. Word has length 89 [2018-06-22 11:05:50,090 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:50,090 INFO ]: With dead ends: 80 [2018-06-22 11:05:50,090 INFO ]: Without dead ends: 78 [2018-06-22 11:05:50,091 INFO ]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=192, Invalid=3590, Unknown=0, NotChecked=0, Total=3782 [2018-06-22 11:05:50,091 INFO ]: Start minimizeSevpa. Operand 78 states. [2018-06-22 11:05:50,094 INFO ]: Finished minimizeSevpa. Reduced states from 78 to 62. [2018-06-22 11:05:50,095 INFO ]: Start removeUnreachable. Operand 62 states. [2018-06-22 11:05:50,095 INFO ]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2018-06-22 11:05:50,095 INFO ]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 89 [2018-06-22 11:05:50,095 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:50,095 INFO ]: Abstraction has 62 states and 66 transitions. [2018-06-22 11:05:50,095 INFO ]: Interpolant automaton has 45 states. [2018-06-22 11:05:50,095 INFO ]: Start isEmpty. Operand 62 states and 66 transitions. [2018-06-22 11:05:50,096 INFO ]: Finished isEmpty. Found accepting run of length 94 [2018-06-22 11:05:50,096 INFO ]: Found error trace [2018-06-22 11:05:50,096 INFO ]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:50,096 INFO ]: === Iteration 27 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:50,096 INFO ]: Analyzing trace with hash -1028148172, now seen corresponding path program 24 times [2018-06-22 11:05:50,096 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:50,096 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:50,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:50,097 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:50,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:50,109 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:52,452 INFO ]: Checked inductivity of 346 backedges. 90 proven. 108 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-06-22 11:05:52,452 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:52,452 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:52,460 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:05:52,503 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-06-22 11:05:52,503 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:52,506 INFO ]: Computing forward predicates... [2018-06-22 11:05:52,554 INFO ]: Checked inductivity of 346 backedges. 90 proven. 101 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-06-22 11:05:52,585 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:52,585 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2018-06-22 11:05:52,585 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:05:52,586 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:05:52,586 INFO ]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:05:52,586 INFO ]: Start difference. First operand 62 states and 66 transitions. Second operand 27 states. [2018-06-22 11:05:53,086 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:53,086 INFO ]: Finished difference Result 80 states and 84 transitions. [2018-06-22 11:05:53,086 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 11:05:53,086 INFO ]: Start accepts. Automaton has 27 states. Word has length 93 [2018-06-22 11:05:53,087 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:53,087 INFO ]: With dead ends: 80 [2018-06-22 11:05:53,087 INFO ]: Without dead ends: 80 [2018-06-22 11:05:53,088 INFO ]: 0 DeclaredPredicates, 152 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1677, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 11:05:53,088 INFO ]: Start minimizeSevpa. Operand 80 states. [2018-06-22 11:05:53,092 INFO ]: Finished minimizeSevpa. Reduced states from 80 to 60. [2018-06-22 11:05:53,092 INFO ]: Start removeUnreachable. Operand 60 states. [2018-06-22 11:05:53,093 INFO ]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2018-06-22 11:05:53,093 INFO ]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 93 [2018-06-22 11:05:53,093 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:53,093 INFO ]: Abstraction has 60 states and 63 transitions. [2018-06-22 11:05:53,093 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:05:53,093 INFO ]: Start isEmpty. Operand 60 states and 63 transitions. [2018-06-22 11:05:53,094 INFO ]: Finished isEmpty. Found accepting run of length 94 [2018-06-22 11:05:53,094 INFO ]: Found error trace [2018-06-22 11:05:53,094 INFO ]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:53,094 INFO ]: === Iteration 28 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:53,094 INFO ]: Analyzing trace with hash -2135581292, now seen corresponding path program 25 times [2018-06-22 11:05:53,094 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:53,094 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:53,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:53,094 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:53,094 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:53,107 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:53,992 INFO ]: Checked inductivity of 342 backedges. 90 proven. 106 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-06-22 11:05:53,993 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:53,993 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:54,001 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:54,037 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:54,040 INFO ]: Computing forward predicates... [2018-06-22 11:05:54,073 INFO ]: Checked inductivity of 342 backedges. 90 proven. 98 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-06-22 11:05:54,092 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:54,092 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2018-06-22 11:05:54,092 INFO ]: Interpolant automaton has 26 states [2018-06-22 11:05:54,092 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 11:05:54,093 INFO ]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-22 11:05:54,093 INFO ]: Start difference. First operand 60 states and 63 transitions. Second operand 26 states. [2018-06-22 11:05:54,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:54,444 INFO ]: Finished difference Result 80 states and 83 transitions. [2018-06-22 11:05:54,445 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 11:05:54,445 INFO ]: Start accepts. Automaton has 26 states. Word has length 93 [2018-06-22 11:05:54,445 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:54,445 INFO ]: With dead ends: 80 [2018-06-22 11:05:54,445 INFO ]: Without dead ends: 62 [2018-06-22 11:05:54,446 INFO ]: 0 DeclaredPredicates, 152 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 11:05:54,446 INFO ]: Start minimizeSevpa. Operand 62 states. [2018-06-22 11:05:54,449 INFO ]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-06-22 11:05:54,449 INFO ]: Start removeUnreachable. Operand 62 states. [2018-06-22 11:05:54,449 INFO ]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2018-06-22 11:05:54,450 INFO ]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 93 [2018-06-22 11:05:54,450 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:54,450 INFO ]: Abstraction has 62 states and 65 transitions. [2018-06-22 11:05:54,450 INFO ]: Interpolant automaton has 26 states. [2018-06-22 11:05:54,450 INFO ]: Start isEmpty. Operand 62 states and 65 transitions. [2018-06-22 11:05:54,450 INFO ]: Finished isEmpty. Found accepting run of length 98 [2018-06-22 11:05:54,450 INFO ]: Found error trace [2018-06-22 11:05:54,450 INFO ]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:54,451 INFO ]: === Iteration 29 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:54,451 INFO ]: Analyzing trace with hash -1395862791, now seen corresponding path program 26 times [2018-06-22 11:05:54,451 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:54,451 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:54,451 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:54,451 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:54,451 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:54,466 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:55,056 INFO ]: Checked inductivity of 381 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-06-22 11:05:55,056 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:55,056 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:55,064 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:55,104 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:55,104 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:55,110 INFO ]: Computing forward predicates... [2018-06-22 11:05:56,050 INFO ]: Checked inductivity of 381 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-06-22 11:05:56,070 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:56,070 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2018-06-22 11:05:56,070 INFO ]: Interpolant automaton has 49 states [2018-06-22 11:05:56,071 INFO ]: Constructing interpolant automaton starting with 49 interpolants. [2018-06-22 11:05:56,071 INFO ]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2018-06-22 11:05:56,071 INFO ]: Start difference. First operand 62 states and 65 transitions. Second operand 49 states. [2018-06-22 11:05:56,589 WARN ]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 11:05:57,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:57,636 INFO ]: Finished difference Result 86 states and 90 transitions. [2018-06-22 11:05:57,636 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 11:05:57,636 INFO ]: Start accepts. Automaton has 49 states. Word has length 97 [2018-06-22 11:05:57,636 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:57,637 INFO ]: With dead ends: 86 [2018-06-22 11:05:57,637 INFO ]: Without dead ends: 84 [2018-06-22 11:05:57,638 INFO ]: 0 DeclaredPredicates, 159 GetRequests, 73 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=4344, Unknown=0, NotChecked=0, Total=4556 [2018-06-22 11:05:57,638 INFO ]: Start minimizeSevpa. Operand 84 states. [2018-06-22 11:05:57,644 INFO ]: Finished minimizeSevpa. Reduced states from 84 to 66. [2018-06-22 11:05:57,644 INFO ]: Start removeUnreachable. Operand 66 states. [2018-06-22 11:05:57,645 INFO ]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2018-06-22 11:05:57,645 INFO ]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 97 [2018-06-22 11:05:57,645 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:57,645 INFO ]: Abstraction has 66 states and 70 transitions. [2018-06-22 11:05:57,645 INFO ]: Interpolant automaton has 49 states. [2018-06-22 11:05:57,645 INFO ]: Start isEmpty. Operand 66 states and 70 transitions. [2018-06-22 11:05:57,646 INFO ]: Finished isEmpty. Found accepting run of length 102 [2018-06-22 11:05:57,646 INFO ]: Found error trace [2018-06-22 11:05:57,646 INFO ]: trace histogram [12, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:57,646 INFO ]: === Iteration 30 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:57,646 INFO ]: Analyzing trace with hash -1948232418, now seen corresponding path program 27 times [2018-06-22 11:05:57,646 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:57,646 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:57,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:57,647 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:57,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:57,659 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:58,194 INFO ]: Checked inductivity of 424 backedges. 110 proven. 130 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-06-22 11:05:58,194 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:58,194 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:58,200 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:58,261 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-06-22 11:05:58,261 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:58,265 INFO ]: Computing forward predicates... [2018-06-22 11:05:58,316 INFO ]: Checked inductivity of 424 backedges. 110 proven. 122 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-06-22 11:05:58,348 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:58,348 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2018-06-22 11:05:58,348 INFO ]: Interpolant automaton has 29 states [2018-06-22 11:05:58,348 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 11:05:58,349 INFO ]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:05:58,349 INFO ]: Start difference. First operand 66 states and 70 transitions. Second operand 29 states. [2018-06-22 11:05:58,837 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:58,837 INFO ]: Finished difference Result 86 states and 90 transitions. [2018-06-22 11:05:58,850 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 11:05:58,850 INFO ]: Start accepts. Automaton has 29 states. Word has length 101 [2018-06-22 11:05:58,850 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:58,851 INFO ]: With dead ends: 86 [2018-06-22 11:05:58,851 INFO ]: Without dead ends: 86 [2018-06-22 11:05:58,852 INFO ]: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 11:05:58,852 INFO ]: Start minimizeSevpa. Operand 86 states. [2018-06-22 11:05:58,854 INFO ]: Finished minimizeSevpa. Reduced states from 86 to 64. [2018-06-22 11:05:58,854 INFO ]: Start removeUnreachable. Operand 64 states. [2018-06-22 11:05:58,855 INFO ]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2018-06-22 11:05:58,855 INFO ]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 101 [2018-06-22 11:05:58,856 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:58,856 INFO ]: Abstraction has 64 states and 67 transitions. [2018-06-22 11:05:58,856 INFO ]: Interpolant automaton has 29 states. [2018-06-22 11:05:58,856 INFO ]: Start isEmpty. Operand 64 states and 67 transitions. [2018-06-22 11:05:58,856 INFO ]: Finished isEmpty. Found accepting run of length 102 [2018-06-22 11:05:58,856 INFO ]: Found error trace [2018-06-22 11:05:58,856 INFO ]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:58,856 INFO ]: === Iteration 31 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:58,857 INFO ]: Analyzing trace with hash 863478014, now seen corresponding path program 28 times [2018-06-22 11:05:58,857 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:58,857 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:58,857 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:58,857 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:58,857 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:58,870 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:59,194 INFO ]: Checked inductivity of 420 backedges. 110 proven. 128 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-06-22 11:05:59,194 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:59,194 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:59,201 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:59,244 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:59,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:59,248 INFO ]: Computing forward predicates... [2018-06-22 11:05:59,322 INFO ]: Checked inductivity of 420 backedges. 110 proven. 119 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-06-22 11:05:59,341 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:59,341 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2018-06-22 11:05:59,341 INFO ]: Interpolant automaton has 28 states [2018-06-22 11:05:59,341 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 11:05:59,341 INFO ]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2018-06-22 11:05:59,341 INFO ]: Start difference. First operand 64 states and 67 transitions. Second operand 28 states. [2018-06-22 11:05:59,960 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:59,960 INFO ]: Finished difference Result 86 states and 89 transitions. [2018-06-22 11:05:59,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 11:05:59,960 INFO ]: Start accepts. Automaton has 28 states. Word has length 101 [2018-06-22 11:05:59,961 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:59,961 INFO ]: With dead ends: 86 [2018-06-22 11:05:59,961 INFO ]: Without dead ends: 66 [2018-06-22 11:05:59,962 INFO ]: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 11:05:59,962 INFO ]: Start minimizeSevpa. Operand 66 states. [2018-06-22 11:05:59,964 INFO ]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-06-22 11:05:59,964 INFO ]: Start removeUnreachable. Operand 66 states. [2018-06-22 11:05:59,965 INFO ]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2018-06-22 11:05:59,965 INFO ]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 101 [2018-06-22 11:05:59,965 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:59,965 INFO ]: Abstraction has 66 states and 69 transitions. [2018-06-22 11:05:59,965 INFO ]: Interpolant automaton has 28 states. [2018-06-22 11:05:59,965 INFO ]: Start isEmpty. Operand 66 states and 69 transitions. [2018-06-22 11:05:59,966 INFO ]: Finished isEmpty. Found accepting run of length 106 [2018-06-22 11:05:59,966 INFO ]: Found error trace [2018-06-22 11:05:59,966 INFO ]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:59,966 INFO ]: === Iteration 32 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:59,966 INFO ]: Analyzing trace with hash 505100899, now seen corresponding path program 29 times [2018-06-22 11:05:59,966 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:59,966 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:59,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:59,967 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:59,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:59,981 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:00,169 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 11:06:00,932 INFO ]: Checked inductivity of 463 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-06-22 11:06:00,932 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:00,932 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:00,954 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:06:01,008 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-06-22 11:06:01,008 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:01,014 INFO ]: Computing forward predicates... [2018-06-22 11:06:02,121 INFO ]: Checked inductivity of 463 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-06-22 11:06:02,143 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:02,143 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2018-06-22 11:06:02,143 INFO ]: Interpolant automaton has 53 states [2018-06-22 11:06:02,143 INFO ]: Constructing interpolant automaton starting with 53 interpolants. [2018-06-22 11:06:02,144 INFO ]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2018-06-22 11:06:02,144 INFO ]: Start difference. First operand 66 states and 69 transitions. Second operand 53 states. [2018-06-22 11:06:03,230 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:03,230 INFO ]: Finished difference Result 92 states and 96 transitions. [2018-06-22 11:06:03,231 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-22 11:06:03,231 INFO ]: Start accepts. Automaton has 53 states. Word has length 105 [2018-06-22 11:06:03,231 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:03,231 INFO ]: With dead ends: 92 [2018-06-22 11:06:03,231 INFO ]: Without dead ends: 90 [2018-06-22 11:06:03,232 INFO ]: 0 DeclaredPredicates, 173 GetRequests, 79 SyntacticMatches, 22 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=232, Invalid=5170, Unknown=0, NotChecked=0, Total=5402 [2018-06-22 11:06:03,232 INFO ]: Start minimizeSevpa. Operand 90 states. [2018-06-22 11:06:03,236 INFO ]: Finished minimizeSevpa. Reduced states from 90 to 70. [2018-06-22 11:06:03,236 INFO ]: Start removeUnreachable. Operand 70 states. [2018-06-22 11:06:03,236 INFO ]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2018-06-22 11:06:03,237 INFO ]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 105 [2018-06-22 11:06:03,237 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:03,237 INFO ]: Abstraction has 70 states and 74 transitions. [2018-06-22 11:06:03,237 INFO ]: Interpolant automaton has 53 states. [2018-06-22 11:06:03,237 INFO ]: Start isEmpty. Operand 70 states and 74 transitions. [2018-06-22 11:06:03,237 INFO ]: Finished isEmpty. Found accepting run of length 110 [2018-06-22 11:06:03,237 INFO ]: Found error trace [2018-06-22 11:06:03,238 INFO ]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:03,238 INFO ]: === Iteration 33 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:03,238 INFO ]: Analyzing trace with hash -380403576, now seen corresponding path program 30 times [2018-06-22 11:06:03,238 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:03,238 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:03,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:03,238 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:03,238 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:03,252 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:03,651 INFO ]: Checked inductivity of 510 backedges. 132 proven. 154 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-06-22 11:06:03,651 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:03,651 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:03,659 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:06:03,714 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-06-22 11:06:03,714 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:03,718 INFO ]: Computing forward predicates... [2018-06-22 11:06:03,783 INFO ]: Checked inductivity of 510 backedges. 132 proven. 145 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-06-22 11:06:03,813 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:03,813 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2018-06-22 11:06:03,814 INFO ]: Interpolant automaton has 31 states [2018-06-22 11:06:03,814 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 11:06:03,814 INFO ]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2018-06-22 11:06:03,814 INFO ]: Start difference. First operand 70 states and 74 transitions. Second operand 31 states. [2018-06-22 11:06:04,270 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:04,270 INFO ]: Finished difference Result 92 states and 96 transitions. [2018-06-22 11:06:04,271 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-22 11:06:04,271 INFO ]: Start accepts. Automaton has 31 states. Word has length 109 [2018-06-22 11:06:04,271 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:04,271 INFO ]: With dead ends: 92 [2018-06-22 11:06:04,271 INFO ]: Without dead ends: 92 [2018-06-22 11:06:04,272 INFO ]: 0 DeclaredPredicates, 180 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=541, Invalid=2321, Unknown=0, NotChecked=0, Total=2862 [2018-06-22 11:06:04,272 INFO ]: Start minimizeSevpa. Operand 92 states. [2018-06-22 11:06:04,275 INFO ]: Finished minimizeSevpa. Reduced states from 92 to 68. [2018-06-22 11:06:04,275 INFO ]: Start removeUnreachable. Operand 68 states. [2018-06-22 11:06:04,276 INFO ]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2018-06-22 11:06:04,276 INFO ]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 109 [2018-06-22 11:06:04,276 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:04,276 INFO ]: Abstraction has 68 states and 71 transitions. [2018-06-22 11:06:04,276 INFO ]: Interpolant automaton has 31 states. [2018-06-22 11:06:04,276 INFO ]: Start isEmpty. Operand 68 states and 71 transitions. [2018-06-22 11:06:04,277 INFO ]: Finished isEmpty. Found accepting run of length 110 [2018-06-22 11:06:04,277 INFO ]: Found error trace [2018-06-22 11:06:04,277 INFO ]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:04,277 INFO ]: === Iteration 34 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:04,277 INFO ]: Analyzing trace with hash -876630296, now seen corresponding path program 31 times [2018-06-22 11:06:04,277 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:04,277 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:04,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:04,278 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:04,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:04,290 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:04,674 INFO ]: Checked inductivity of 506 backedges. 132 proven. 152 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-06-22 11:06:04,674 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:04,674 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:04,680 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:04,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:04,747 INFO ]: Computing forward predicates... [2018-06-22 11:06:04,900 INFO ]: Checked inductivity of 506 backedges. 132 proven. 142 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-06-22 11:06:04,932 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:04,932 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2018-06-22 11:06:04,932 INFO ]: Interpolant automaton has 30 states [2018-06-22 11:06:04,932 INFO ]: Constructing interpolant automaton starting with 30 interpolants. [2018-06-22 11:06:04,932 INFO ]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2018-06-22 11:06:04,932 INFO ]: Start difference. First operand 68 states and 71 transitions. Second operand 30 states. [2018-06-22 11:06:05,809 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:05,809 INFO ]: Finished difference Result 92 states and 95 transitions. [2018-06-22 11:06:05,809 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-22 11:06:05,809 INFO ]: Start accepts. Automaton has 30 states. Word has length 109 [2018-06-22 11:06:05,809 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:05,810 INFO ]: With dead ends: 92 [2018-06-22 11:06:05,810 INFO ]: Without dead ends: 70 [2018-06-22 11:06:05,810 INFO ]: 0 DeclaredPredicates, 180 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2018-06-22 11:06:05,810 INFO ]: Start minimizeSevpa. Operand 70 states. [2018-06-22 11:06:05,812 INFO ]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-06-22 11:06:05,812 INFO ]: Start removeUnreachable. Operand 70 states. [2018-06-22 11:06:05,813 INFO ]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2018-06-22 11:06:05,813 INFO ]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 109 [2018-06-22 11:06:05,813 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:05,813 INFO ]: Abstraction has 70 states and 73 transitions. [2018-06-22 11:06:05,813 INFO ]: Interpolant automaton has 30 states. [2018-06-22 11:06:05,813 INFO ]: Start isEmpty. Operand 70 states and 73 transitions. [2018-06-22 11:06:05,813 INFO ]: Finished isEmpty. Found accepting run of length 114 [2018-06-22 11:06:05,813 INFO ]: Found error trace [2018-06-22 11:06:05,813 INFO ]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:05,814 INFO ]: === Iteration 35 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:05,814 INFO ]: Analyzing trace with hash -1680700339, now seen corresponding path program 32 times [2018-06-22 11:06:05,814 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:05,814 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:05,814 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:05,814 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:05,814 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:05,829 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:06,021 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 11:06:06,764 INFO ]: Checked inductivity of 553 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-06-22 11:06:06,765 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:06,765 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:06,770 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:06:06,815 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:06:06,815 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:06,822 INFO ]: Computing forward predicates... [2018-06-22 11:06:08,030 INFO ]: Checked inductivity of 553 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-06-22 11:06:08,055 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:08,055 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2018-06-22 11:06:08,055 INFO ]: Interpolant automaton has 57 states [2018-06-22 11:06:08,055 INFO ]: Constructing interpolant automaton starting with 57 interpolants. [2018-06-22 11:06:08,056 INFO ]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2018-06-22 11:06:08,056 INFO ]: Start difference. First operand 70 states and 73 transitions. Second operand 57 states. [2018-06-22 11:06:09,264 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:09,264 INFO ]: Finished difference Result 98 states and 102 transitions. [2018-06-22 11:06:09,264 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-06-22 11:06:09,265 INFO ]: Start accepts. Automaton has 57 states. Word has length 113 [2018-06-22 11:06:09,265 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:09,265 INFO ]: With dead ends: 98 [2018-06-22 11:06:09,265 INFO ]: Without dead ends: 96 [2018-06-22 11:06:09,266 INFO ]: 0 DeclaredPredicates, 187 GetRequests, 85 SyntacticMatches, 24 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=6068, Unknown=0, NotChecked=0, Total=6320 [2018-06-22 11:06:09,266 INFO ]: Start minimizeSevpa. Operand 96 states. [2018-06-22 11:06:09,268 INFO ]: Finished minimizeSevpa. Reduced states from 96 to 74. [2018-06-22 11:06:09,268 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-22 11:06:09,269 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2018-06-22 11:06:09,269 INFO ]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 113 [2018-06-22 11:06:09,269 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:09,269 INFO ]: Abstraction has 74 states and 78 transitions. [2018-06-22 11:06:09,269 INFO ]: Interpolant automaton has 57 states. [2018-06-22 11:06:09,269 INFO ]: Start isEmpty. Operand 74 states and 78 transitions. [2018-06-22 11:06:09,270 INFO ]: Finished isEmpty. Found accepting run of length 118 [2018-06-22 11:06:09,270 INFO ]: Found error trace [2018-06-22 11:06:09,270 INFO ]: trace histogram [14, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:09,270 INFO ]: === Iteration 36 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:09,270 INFO ]: Analyzing trace with hash -1854769550, now seen corresponding path program 33 times [2018-06-22 11:06:09,270 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:09,270 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:09,270 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:09,270 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:09,270 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:09,282 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:09,734 INFO ]: Checked inductivity of 604 backedges. 156 proven. 180 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-06-22 11:06:09,735 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:09,735 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:09,740 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:06:09,801 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-06-22 11:06:09,801 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:09,806 INFO ]: Computing forward predicates... [2018-06-22 11:06:09,911 INFO ]: Checked inductivity of 604 backedges. 156 proven. 170 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-06-22 11:06:09,944 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:09,945 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2018-06-22 11:06:09,945 INFO ]: Interpolant automaton has 33 states [2018-06-22 11:06:09,945 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 11:06:09,945 INFO ]: CoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 11:06:09,945 INFO ]: Start difference. First operand 74 states and 78 transitions. Second operand 33 states. [2018-06-22 11:06:10,639 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:10,639 INFO ]: Finished difference Result 98 states and 102 transitions. [2018-06-22 11:06:10,639 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-06-22 11:06:10,639 INFO ]: Start accepts. Automaton has 33 states. Word has length 117 [2018-06-22 11:06:10,639 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:10,640 INFO ]: With dead ends: 98 [2018-06-22 11:06:10,640 INFO ]: Without dead ends: 98 [2018-06-22 11:06:10,640 INFO ]: 0 DeclaredPredicates, 194 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2018-06-22 11:06:10,640 INFO ]: Start minimizeSevpa. Operand 98 states. [2018-06-22 11:06:10,644 INFO ]: Finished minimizeSevpa. Reduced states from 98 to 72. [2018-06-22 11:06:10,644 INFO ]: Start removeUnreachable. Operand 72 states. [2018-06-22 11:06:10,644 INFO ]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2018-06-22 11:06:10,644 INFO ]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 117 [2018-06-22 11:06:10,645 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:10,645 INFO ]: Abstraction has 72 states and 75 transitions. [2018-06-22 11:06:10,645 INFO ]: Interpolant automaton has 33 states. [2018-06-22 11:06:10,645 INFO ]: Start isEmpty. Operand 72 states and 75 transitions. [2018-06-22 11:06:10,645 INFO ]: Finished isEmpty. Found accepting run of length 118 [2018-06-22 11:06:10,645 INFO ]: Found error trace [2018-06-22 11:06:10,645 INFO ]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:10,645 INFO ]: === Iteration 37 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:10,646 INFO ]: Analyzing trace with hash 922158930, now seen corresponding path program 34 times [2018-06-22 11:06:10,646 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:10,646 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:10,646 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:10,646 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:10,646 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:10,662 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:11,442 INFO ]: Checked inductivity of 600 backedges. 156 proven. 178 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2018-06-22 11:06:11,442 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:11,442 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:11,447 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:06:11,496 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:06:11,496 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:11,500 INFO ]: Computing forward predicates... [2018-06-22 11:06:11,552 INFO ]: Checked inductivity of 600 backedges. 156 proven. 167 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2018-06-22 11:06:11,571 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:11,572 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2018-06-22 11:06:11,572 INFO ]: Interpolant automaton has 32 states [2018-06-22 11:06:11,572 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 11:06:11,572 INFO ]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:06:11,572 INFO ]: Start difference. First operand 72 states and 75 transitions. Second operand 32 states. [2018-06-22 11:06:12,160 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:12,160 INFO ]: Finished difference Result 98 states and 101 transitions. [2018-06-22 11:06:12,160 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-06-22 11:06:12,160 INFO ]: Start accepts. Automaton has 32 states. Word has length 117 [2018-06-22 11:06:12,161 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:12,161 INFO ]: With dead ends: 98 [2018-06-22 11:06:12,161 INFO ]: Without dead ends: 74 [2018-06-22 11:06:12,161 INFO ]: 0 DeclaredPredicates, 194 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=2674, Unknown=0, NotChecked=0, Total=3306 [2018-06-22 11:06:12,162 INFO ]: Start minimizeSevpa. Operand 74 states. [2018-06-22 11:06:12,165 INFO ]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-06-22 11:06:12,165 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-22 11:06:12,166 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2018-06-22 11:06:12,166 INFO ]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 117 [2018-06-22 11:06:12,166 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:12,166 INFO ]: Abstraction has 74 states and 77 transitions. [2018-06-22 11:06:12,166 INFO ]: Interpolant automaton has 32 states. [2018-06-22 11:06:12,166 INFO ]: Start isEmpty. Operand 74 states and 77 transitions. [2018-06-22 11:06:12,167 INFO ]: Finished isEmpty. Found accepting run of length 122 [2018-06-22 11:06:12,167 INFO ]: Found error trace [2018-06-22 11:06:12,167 INFO ]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:12,167 INFO ]: === Iteration 38 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:12,168 INFO ]: Analyzing trace with hash 1107560631, now seen corresponding path program 35 times [2018-06-22 11:06:12,168 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:12,168 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:12,168 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:12,168 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:12,168 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:12,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:12,368 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 11:06:13,497 INFO ]: Checked inductivity of 651 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-06-22 11:06:13,498 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:13,498 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:13,505 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:06:13,572 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-06-22 11:06:13,572 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:13,577 INFO ]: Computing forward predicates... [2018-06-22 11:06:14,750 INFO ]: Checked inductivity of 651 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-06-22 11:06:14,770 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:14,770 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2018-06-22 11:06:14,770 INFO ]: Interpolant automaton has 61 states [2018-06-22 11:06:14,770 INFO ]: Constructing interpolant automaton starting with 61 interpolants. [2018-06-22 11:06:14,770 INFO ]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2018-06-22 11:06:14,771 INFO ]: Start difference. First operand 74 states and 77 transitions. Second operand 61 states. [2018-06-22 11:06:16,436 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:16,436 INFO ]: Finished difference Result 104 states and 108 transitions. [2018-06-22 11:06:16,436 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-06-22 11:06:16,436 INFO ]: Start accepts. Automaton has 61 states. Word has length 121 [2018-06-22 11:06:16,436 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:16,436 INFO ]: With dead ends: 104 [2018-06-22 11:06:16,436 INFO ]: Without dead ends: 102 [2018-06-22 11:06:16,437 INFO ]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 26 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=272, Invalid=7038, Unknown=0, NotChecked=0, Total=7310 [2018-06-22 11:06:16,437 INFO ]: Start minimizeSevpa. Operand 102 states. [2018-06-22 11:06:16,441 INFO ]: Finished minimizeSevpa. Reduced states from 102 to 78. [2018-06-22 11:06:16,441 INFO ]: Start removeUnreachable. Operand 78 states. [2018-06-22 11:06:16,441 INFO ]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2018-06-22 11:06:16,441 INFO ]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 121 [2018-06-22 11:06:16,442 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:16,442 INFO ]: Abstraction has 78 states and 82 transitions. [2018-06-22 11:06:16,442 INFO ]: Interpolant automaton has 61 states. [2018-06-22 11:06:16,442 INFO ]: Start isEmpty. Operand 78 states and 82 transitions. [2018-06-22 11:06:16,442 INFO ]: Finished isEmpty. Found accepting run of length 126 [2018-06-22 11:06:16,442 INFO ]: Found error trace [2018-06-22 11:06:16,442 INFO ]: trace histogram [15, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:16,442 INFO ]: === Iteration 39 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:16,443 INFO ]: Analyzing trace with hash -755599652, now seen corresponding path program 36 times [2018-06-22 11:06:16,443 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:16,443 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:16,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:16,443 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:16,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:16,458 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:17,267 INFO ]: Checked inductivity of 706 backedges. 182 proven. 208 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-06-22 11:06:17,267 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:17,267 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:17,272 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:06:17,334 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-06-22 11:06:17,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:17,338 INFO ]: Computing forward predicates... [2018-06-22 11:06:17,394 INFO ]: Checked inductivity of 706 backedges. 182 proven. 197 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-06-22 11:06:17,427 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:17,427 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2018-06-22 11:06:17,428 INFO ]: Interpolant automaton has 35 states [2018-06-22 11:06:17,428 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-22 11:06:17,428 INFO ]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 11:06:17,428 INFO ]: Start difference. First operand 78 states and 82 transitions. Second operand 35 states. [2018-06-22 11:06:18,191 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:18,191 INFO ]: Finished difference Result 104 states and 108 transitions. [2018-06-22 11:06:18,191 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-06-22 11:06:18,191 INFO ]: Start accepts. Automaton has 35 states. Word has length 125 [2018-06-22 11:06:18,191 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:18,192 INFO ]: With dead ends: 104 [2018-06-22 11:06:18,192 INFO ]: Without dead ends: 104 [2018-06-22 11:06:18,192 INFO ]: 0 DeclaredPredicates, 208 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2018-06-22 11:06:18,192 INFO ]: Start minimizeSevpa. Operand 104 states. [2018-06-22 11:06:18,195 INFO ]: Finished minimizeSevpa. Reduced states from 104 to 76. [2018-06-22 11:06:18,195 INFO ]: Start removeUnreachable. Operand 76 states. [2018-06-22 11:06:18,195 INFO ]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2018-06-22 11:06:18,195 INFO ]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 125 [2018-06-22 11:06:18,195 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:18,195 INFO ]: Abstraction has 76 states and 79 transitions. [2018-06-22 11:06:18,195 INFO ]: Interpolant automaton has 35 states. [2018-06-22 11:06:18,196 INFO ]: Start isEmpty. Operand 76 states and 79 transitions. [2018-06-22 11:06:18,197 INFO ]: Finished isEmpty. Found accepting run of length 126 [2018-06-22 11:06:18,197 INFO ]: Found error trace [2018-06-22 11:06:18,197 INFO ]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:18,197 INFO ]: === Iteration 40 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:18,197 INFO ]: Analyzing trace with hash -891360708, now seen corresponding path program 37 times [2018-06-22 11:06:18,197 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:18,197 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:18,198 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:18,198 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:06:18,198 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:18,211 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:19,132 INFO ]: Checked inductivity of 702 backedges. 182 proven. 206 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2018-06-22 11:06:19,132 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:06:19,132 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:06:19,137 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:19,196 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:19,202 INFO ]: Computing forward predicates... [2018-06-22 11:06:19,361 INFO ]: Checked inductivity of 702 backedges. 182 proven. 194 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-06-22 11:06:19,392 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:06:19,392 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2018-06-22 11:06:19,392 INFO ]: Interpolant automaton has 34 states [2018-06-22 11:06:19,392 INFO ]: Constructing interpolant automaton starting with 34 interpolants. [2018-06-22 11:06:19,393 INFO ]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 11:06:19,393 INFO ]: Start difference. First operand 76 states and 79 transitions. Second operand 34 states. Received shutdown request... [2018-06-22 11:06:19,803 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:06:19,804 WARN ]: Verification canceled [2018-06-22 11:06:19,924 WARN ]: Timeout [2018-06-22 11:06:19,926 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:06:19 BoogieIcfgContainer [2018-06-22 11:06:19,926 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:06:19,927 INFO ]: Toolchain (without parser) took 59369.26 ms. Allocated memory was 306.7 MB in the beginning and 797.4 MB in the end (delta: 490.7 MB). Free memory was 263.2 MB in the beginning and 769.7 MB in the end (delta: -506.4 MB). Peak memory consumption was 121.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:19,927 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:06:19,927 INFO ]: ChcToBoogie took 49.44 ms. Allocated memory is still 306.7 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 11:06:19,928 INFO ]: Boogie Preprocessor took 32.92 ms. Allocated memory is still 306.7 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:19,928 INFO ]: RCFGBuilder took 279.48 ms. Allocated memory is still 306.7 MB. Free memory was 259.2 MB in the beginning and 251.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:19,928 INFO ]: TraceAbstraction took 58997.30 ms. Allocated memory was 306.7 MB in the beginning and 797.4 MB in the end (delta: 490.7 MB). Free memory was 251.3 MB in the beginning and 769.7 MB in the end (delta: -518.4 MB). Peak memory consumption was 109.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:19,932 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.44 ms. Allocated memory is still 306.7 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. * Boogie Preprocessor took 32.92 ms. Allocated memory is still 306.7 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 279.48 ms. Allocated memory is still 306.7 MB. Free memory was 259.2 MB in the beginning and 251.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58997.30 ms. Allocated memory was 306.7 MB in the beginning and 797.4 MB in the end (delta: 490.7 MB). Free memory was 251.3 MB in the beginning and 769.7 MB in the end (delta: -518.4 MB). Peak memory consumption was 109.1 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (76states) and interpolant automaton (currently 4 states, 34 states before enhancement), while ReachableStatesComputation was computing reachable states (8 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. TIMEOUT Result, 58.9s OverallTime, 40 OverallIterations, 15 TraceHistogramMax, 21.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1295 SDtfs, 361 SDslu, 20269 SDs, 0 SdLazy, 13955 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4725 GetRequests, 2982 SyntacticMatches, 208 SemanticMatches, 1535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13103 ImplicationChecksByTransitivity, 37.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=38, 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: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 364 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 31.4s InterpolantComputationTime, 5923 NumberOfCodeBlocks, 5923 NumberOfCodeBlocksAsserted, 236 NumberOfCheckSat, 5844 ConstructedInterpolants, 0 QuantifiedInterpolants, 2248384 SizeOfPredicates, 611 NumberOfNonLiveVariables, 12779 ConjunctsInSsa, 2288 ConjunctsInUnsatCore, 79 InterpolantComputations, 1 PerfectInterpolantSequences, 12698/20150 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/upcount_merged_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-06-19-949.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/upcount_merged_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-06-19-949.csv Completed graceful shutdown