java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:24:16,796 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:24:16,798 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:24:16,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:24:16,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:24:16,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:24:16,812 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:24:16,813 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:24:16,815 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:24:16,816 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:24:16,817 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:24:16,817 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:24:16,818 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:24:16,819 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:24:16,820 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:24:16,821 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:24:16,822 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:24:16,824 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:24:16,826 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:24:16,827 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:24:16,837 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:24:16,840 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 01:24:16,849 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:24:16,850 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:24:16,851 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:24:16,857 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:24:16,858 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:24:16,858 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:24:16,859 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:24:16,877 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:24:16,877 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:24:16,878 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:24:16,878 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:24:16,879 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:24:16,879 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:24:16,880 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:24:16,880 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:24:16,881 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:24:16,881 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:24:16,881 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:24:16,881 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:24:16,881 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:24:16,882 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:24:16,882 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:24:16,882 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:24:16,882 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:24:16,882 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:24:16,883 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:24:16,883 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:24:16,883 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:24:16,886 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:24:16,886 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:24:16,934 INFO ]: Repository-Root is: /tmp [2018-06-25 01:24:16,948 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:24:16,951 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:24:16,958 INFO ]: Initializing SmtParser... [2018-06-25 01:24:16,958 INFO ]: SmtParser initialized [2018-06-25 01:24:16,959 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 [2018-06-25 01:24:16,960 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 [2018-06-25 01:24:17,053 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 unknown [2018-06-25 01:24:17,377 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-mime-fromqp.c.smt2 [2018-06-25 01:24:17,382 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:24:17,388 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:24:17,389 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:24:17,389 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:24:17,389 INFO ]: ChcToBoogie initialized [2018-06-25 01:24:17,392 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,452 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17 Unit [2018-06-25 01:24:17,452 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:24:17,453 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:24:17,453 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:24:17,453 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:24:17,468 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,468 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,478 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,478 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,486 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,487 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,489 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,492 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:24:17,493 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:24:17,493 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:24:17,493 INFO ]: RCFGBuilder initialized [2018-06-25 01:24:17,494 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (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) [2018-06-25 01:24:17,505 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:24:17,505 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:24:17,505 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:24:17,505 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:24:17,505 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:24:17,505 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 [2018-06-25 01:24:17,712 INFO ]: Using library mode [2018-06-25 01:24:17,712 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:24:17 BoogieIcfgContainer [2018-06-25 01:24:17,712 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:24:17,713 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:24:17,713 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:24:17,714 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:24:17,714 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:24:17" (1/1) ... [2018-06-25 01:24:17,730 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:24:17,731 INFO ]: Using Remove infeasible edges [2018-06-25 01:24:17,732 INFO ]: Using Maximize final states [2018-06-25 01:24:17,733 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:24:17,733 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:24:17,734 INFO ]: Using Remove sink states [2018-06-25 01:24:17,735 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:24:17,735 INFO ]: Using Use SBE [2018-06-25 01:24:17,742 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:24:17,851 WARN ]: aborting because of expected exponential blowup for input size 67 [2018-06-25 01:24:17,864 WARN ]: aborting because of expected exponential blowup for input size 67 [2018-06-25 01:24:17,865 INFO ]: SBE split 1 edges [2018-06-25 01:24:17,876 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:24:17,877 INFO ]: 0 new accepting states [2018-06-25 01:24:18,011 INFO ]: Removed 9 edges and 2 locations by large block encoding [2018-06-25 01:24:18,013 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:24:18,014 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:24:18,015 INFO ]: 0 new accepting states [2018-06-25 01:24:18,015 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:24:18,015 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:24:18,015 INFO ]: Encoded RCFG 6 locations, 11 edges [2018-06-25 01:24:18,015 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:24:18 BasicIcfg [2018-06-25 01:24:18,015 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:24:18,016 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:24:18,016 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:24:18,019 INFO ]: TraceAbstraction initialized [2018-06-25 01:24:18,020 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:24:17" (1/4) ... [2018-06-25 01:24:18,021 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aecb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:24:18, skipping insertion in model container [2018-06-25 01:24:18,021 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:24:17" (2/4) ... [2018-06-25 01:24:18,021 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aecb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:24:18, skipping insertion in model container [2018-06-25 01:24:18,021 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:24:17" (3/4) ... [2018-06-25 01:24:18,021 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687aecb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:24:18, skipping insertion in model container [2018-06-25 01:24:18,021 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:24:18" (4/4) ... [2018-06-25 01:24:18,023 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:24:18,032 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:24:18,044 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:24:18,122 INFO ]: Using default assertion order modulation [2018-06-25 01:24:18,122 INFO ]: Interprodecural is true [2018-06-25 01:24:18,122 INFO ]: Hoare is false [2018-06-25 01:24:18,122 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:24:18,122 INFO ]: Backedges is TWOTRACK [2018-06-25 01:24:18,122 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:24:18,122 INFO ]: Difference is false [2018-06-25 01:24:18,123 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:24:18,123 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:24:18,135 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:24:18,145 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:24:18,146 INFO ]: Found error trace [2018-06-25 01:24:18,146 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:24:18,147 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:18,153 INFO ]: Analyzing trace with hash 35591879, now seen corresponding path program 1 times [2018-06-25 01:24:18,156 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:18,156 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:18,192 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,192 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:18,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,233 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:18,286 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:18,287 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:24:18,288 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:24:18,289 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:24:18,300 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:24:18,300 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:24:18,303 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:24:18,484 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:18,484 INFO ]: Finished difference Result 7 states and 12 transitions. [2018-06-25 01:24:18,485 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:24:18,486 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:24:18,486 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:18,496 INFO ]: With dead ends: 7 [2018-06-25 01:24:18,497 INFO ]: Without dead ends: 7 [2018-06-25 01:24:18,499 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:24:18,513 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:24:18,529 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:24:18,530 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:24:18,530 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 12 transitions. [2018-06-25 01:24:18,532 INFO ]: Start accepts. Automaton has 7 states and 12 transitions. Word has length 5 [2018-06-25 01:24:18,533 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:18,533 INFO ]: Abstraction has 7 states and 12 transitions. [2018-06-25 01:24:18,533 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:24:18,533 INFO ]: Start isEmpty. Operand 7 states and 12 transitions. [2018-06-25 01:24:18,533 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:24:18,533 INFO ]: Found error trace [2018-06-25 01:24:18,533 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:24:18,533 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:18,533 INFO ]: Analyzing trace with hash 35621670, now seen corresponding path program 1 times [2018-06-25 01:24:18,533 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:18,533 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:18,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:18,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,540 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:18,597 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:18,597 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:24:18,597 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:24:18,599 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:24:18,599 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:24:18,599 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:24:18,599 INFO ]: Start difference. First operand 7 states and 12 transitions. Second operand 3 states. [2018-06-25 01:24:18,735 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:18,735 INFO ]: Finished difference Result 9 states and 14 transitions. [2018-06-25 01:24:18,736 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:24:18,736 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:24:18,736 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:18,736 INFO ]: With dead ends: 9 [2018-06-25 01:24:18,736 INFO ]: Without dead ends: 9 [2018-06-25 01:24:18,737 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:24:18,737 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 01:24:18,738 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 7. [2018-06-25 01:24:18,738 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:24:18,739 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 12 transitions. [2018-06-25 01:24:18,739 INFO ]: Start accepts. Automaton has 7 states and 12 transitions. Word has length 5 [2018-06-25 01:24:18,739 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:18,739 INFO ]: Abstraction has 7 states and 12 transitions. [2018-06-25 01:24:18,739 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:24:18,739 INFO ]: Start isEmpty. Operand 7 states and 12 transitions. [2018-06-25 01:24:18,739 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:24:18,739 INFO ]: Found error trace [2018-06-25 01:24:18,739 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:24:18,739 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:18,740 INFO ]: Analyzing trace with hash 1102765081, now seen corresponding path program 1 times [2018-06-25 01:24:18,740 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:18,740 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:18,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,741 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:18,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:18,834 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:19,043 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:19,044 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:19,044 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 [2018-06-25 01:24:19,051 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:19,119 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:19,128 INFO ]: Computing forward predicates... [2018-06-25 01:24:19,589 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:19,624 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:19,624 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 01:24:19,624 INFO ]: Interpolant automaton has 4 states [2018-06-25 01:24:19,625 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 01:24:19,625 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:24:19,625 INFO ]: Start difference. First operand 7 states and 12 transitions. Second operand 4 states. [2018-06-25 01:24:19,836 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:19,836 INFO ]: Finished difference Result 9 states and 14 transitions. [2018-06-25 01:24:19,837 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:24:19,838 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-25 01:24:19,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:19,838 INFO ]: With dead ends: 9 [2018-06-25 01:24:19,838 INFO ]: Without dead ends: 9 [2018-06-25 01:24:19,838 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:24:19,838 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 01:24:19,839 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-25 01:24:19,839 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:24:19,840 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-25 01:24:19,840 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-25 01:24:19,840 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:19,840 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-25 01:24:19,840 INFO ]: Interpolant automaton has 4 states. [2018-06-25 01:24:19,840 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-25 01:24:19,840 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:24:19,840 INFO ]: Found error trace [2018-06-25 01:24:19,840 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:24:19,840 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:19,841 INFO ]: Analyzing trace with hash 1103688602, now seen corresponding path program 1 times [2018-06-25 01:24:19,841 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:19,841 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:19,841 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:19,841 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:19,841 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:19,897 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:20,198 WARN ]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 01:24:20,199 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:20,199 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:20,199 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 01:24:20,217 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:24:20,272 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:20,274 INFO ]: Computing forward predicates... [2018-06-25 01:24:20,602 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:20,625 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:20,625 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:24:20,626 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:24:20,626 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:24:20,626 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:24:20,626 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 5 states. [2018-06-25 01:24:20,804 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:20,804 INFO ]: Finished difference Result 13 states and 18 transitions. [2018-06-25 01:24:20,805 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 01:24:20,805 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:24:20,805 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:20,805 INFO ]: With dead ends: 13 [2018-06-25 01:24:20,805 INFO ]: Without dead ends: 13 [2018-06-25 01:24:20,805 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 01:24:20,805 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:24:20,807 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 8. [2018-06-25 01:24:20,807 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:24:20,807 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 13 transitions. [2018-06-25 01:24:20,807 INFO ]: Start accepts. Automaton has 8 states and 13 transitions. Word has length 6 [2018-06-25 01:24:20,807 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:20,807 INFO ]: Abstraction has 8 states and 13 transitions. [2018-06-25 01:24:20,807 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:24:20,808 INFO ]: Start isEmpty. Operand 8 states and 13 transitions. [2018-06-25 01:24:20,808 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:24:20,808 INFO ]: Found error trace [2018-06-25 01:24:20,808 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:24:20,808 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:20,808 INFO ]: Analyzing trace with hash -174604025, now seen corresponding path program 2 times [2018-06-25 01:24:20,808 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:20,808 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:20,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:20,810 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:24:20,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:20,843 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:21,040 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:21,040 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:21,040 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 [2018-06-25 01:24:21,046 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:24:21,104 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:24:21,104 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:21,107 INFO ]: Computing forward predicates... [2018-06-25 01:24:24,726 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:24,758 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:24,758 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:24:24,759 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:24:24,759 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:24:24,759 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:24:24,759 INFO ]: Start difference. First operand 8 states and 13 transitions. Second operand 6 states. [2018-06-25 01:24:24,923 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:24,923 INFO ]: Finished difference Result 12 states and 17 transitions. [2018-06-25 01:24:24,923 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:24:24,923 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:24:24,923 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:24,924 INFO ]: With dead ends: 12 [2018-06-25 01:24:24,924 INFO ]: Without dead ends: 12 [2018-06-25 01:24:24,924 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:24:24,924 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 01:24:24,926 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-25 01:24:24,926 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:24:24,926 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-25 01:24:24,926 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-25 01:24:24,926 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:24,926 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-25 01:24:24,926 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:24:24,926 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-25 01:24:24,926 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:24:24,926 INFO ]: Found error trace [2018-06-25 01:24:24,926 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:24:24,927 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:24,927 INFO ]: Analyzing trace with hash -145974874, now seen corresponding path program 2 times [2018-06-25 01:24:24,927 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:24,927 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:24,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:24,928 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:24:24,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:24,965 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:25,038 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:25,038 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:25,038 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 [2018-06-25 01:24:25,045 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:24:25,074 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:24:25,074 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:25,076 INFO ]: Computing forward predicates... [2018-06-25 01:24:25,485 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:25,519 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:25,519 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:24:25,519 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:24:25,520 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:24:25,520 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:24:25,520 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-25 01:24:26,121 WARN ]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-25 01:24:26,559 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:26,559 INFO ]: Finished difference Result 15 states and 20 transitions. [2018-06-25 01:24:26,560 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:24:26,560 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:24:26,560 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:26,561 INFO ]: With dead ends: 15 [2018-06-25 01:24:26,561 INFO ]: Without dead ends: 15 [2018-06-25 01:24:26,561 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:24:26,561 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 01:24:26,562 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 9. [2018-06-25 01:24:26,562 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:24:26,562 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-25 01:24:26,563 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 7 [2018-06-25 01:24:26,563 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:26,563 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-25 01:24:26,563 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:24:26,563 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-25 01:24:26,563 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:24:26,563 INFO ]: Found error trace [2018-06-25 01:24:26,563 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:24:26,563 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:26,563 INFO ]: Analyzing trace with hash -1118340647, now seen corresponding path program 3 times [2018-06-25 01:24:26,563 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:26,563 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:26,564 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:26,564 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:24:26,564 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:26,610 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:27,368 WARN ]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 01:24:27,472 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:27,472 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:27,472 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 [2018-06-25 01:24:27,477 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:24:27,525 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:24:27,525 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:27,528 INFO ]: Computing forward predicates... [2018-06-25 01:24:29,062 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:39,989 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:40,008 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:40,013 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-25 01:24:40,013 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:24:40,013 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:24:40,013 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:24:40,013 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-25 01:24:40,162 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:40,162 INFO ]: Finished difference Result 13 states and 18 transitions. [2018-06-25 01:24:40,162 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:24:40,162 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 01:24:40,162 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:40,162 INFO ]: With dead ends: 13 [2018-06-25 01:24:40,162 INFO ]: Without dead ends: 13 [2018-06-25 01:24:40,163 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-25 01:24:40,163 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:24:40,164 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 10. [2018-06-25 01:24:40,164 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:24:40,164 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-25 01:24:40,164 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 8 [2018-06-25 01:24:40,164 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:40,164 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-25 01:24:40,164 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:24:40,165 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-25 01:24:40,165 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:24:40,165 INFO ]: Found error trace [2018-06-25 01:24:40,165 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:24:40,165 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:40,165 INFO ]: Analyzing trace with hash -230836966, now seen corresponding path program 3 times [2018-06-25 01:24:40,165 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:40,165 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:40,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:40,166 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:24:40,166 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:40,204 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:40,602 WARN ]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 01:24:40,619 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:40,619 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:40,619 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 [2018-06-25 01:24:40,625 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:24:40,663 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:24:40,663 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:40,667 INFO ]: Computing forward predicates... [2018-06-25 01:24:40,819 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:42,759 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:42,780 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:42,780 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 01:24:42,780 INFO ]: Interpolant automaton has 7 states [2018-06-25 01:24:42,780 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 01:24:42,780 INFO ]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 01:24:42,780 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 7 states. [2018-06-25 01:24:42,907 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:42,907 INFO ]: Finished difference Result 18 states and 23 transitions. [2018-06-25 01:24:42,907 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 01:24:42,907 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-25 01:24:42,907 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:42,908 INFO ]: With dead ends: 18 [2018-06-25 01:24:42,908 INFO ]: Without dead ends: 18 [2018-06-25 01:24:42,908 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-06-25 01:24:42,908 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-25 01:24:42,909 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 10. [2018-06-25 01:24:42,909 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:24:42,910 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-25 01:24:42,910 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 8 [2018-06-25 01:24:42,910 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:42,910 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-25 01:24:42,910 INFO ]: Interpolant automaton has 7 states. [2018-06-25 01:24:42,910 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-25 01:24:42,910 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:24:42,910 INFO ]: Found error trace [2018-06-25 01:24:42,910 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:24:42,910 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:42,910 INFO ]: Analyzing trace with hash -309404857, now seen corresponding path program 4 times [2018-06-25 01:24:42,910 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:42,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:42,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:42,911 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:24:42,911 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:42,963 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:43,224 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 01:24:43,900 WARN ]: Spent 619.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-06-25 01:24:44,111 WARN ]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 01:24:44,130 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:44,131 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:44,131 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 [2018-06-25 01:24:44,140 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 01:24:44,217 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 01:24:44,217 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:44,221 INFO ]: Computing forward predicates... [2018-06-25 01:24:44,954 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:44,976 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:44,993 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:24:45,017 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:45,022 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:45,062 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:53,140 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 12 [2018-06-25 01:24:56,650 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:24:57,511 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:57,531 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:24:57,531 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-25 01:24:57,531 INFO ]: Interpolant automaton has 9 states [2018-06-25 01:24:57,531 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 01:24:57,531 INFO ]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-06-25 01:24:57,531 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 9 states. [2018-06-25 01:24:57,781 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-06-25 01:24:57,880 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:24:57,880 INFO ]: Finished difference Result 18 states and 23 transitions. [2018-06-25 01:24:57,880 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 01:24:57,880 INFO ]: Start accepts. Automaton has 9 states. Word has length 9 [2018-06-25 01:24:57,881 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:24:57,881 INFO ]: With dead ends: 18 [2018-06-25 01:24:57,881 INFO ]: Without dead ends: 18 [2018-06-25 01:24:57,882 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2018-06-25 01:24:57,882 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-25 01:24:57,884 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 11. [2018-06-25 01:24:57,884 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 01:24:57,884 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2018-06-25 01:24:57,884 INFO ]: Start accepts. Automaton has 11 states and 16 transitions. Word has length 9 [2018-06-25 01:24:57,885 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:24:57,885 INFO ]: Abstraction has 11 states and 16 transitions. [2018-06-25 01:24:57,885 INFO ]: Interpolant automaton has 9 states. [2018-06-25 01:24:57,885 INFO ]: Start isEmpty. Operand 11 states and 16 transitions. [2018-06-25 01:24:57,885 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:24:57,885 INFO ]: Found error trace [2018-06-25 01:24:57,885 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:24:57,885 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:24:57,885 INFO ]: Analyzing trace with hash 1433405478, now seen corresponding path program 4 times [2018-06-25 01:24:57,885 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:24:57,885 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:24:57,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:57,886 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:24:57,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:24:57,932 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:58,181 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:24:58,181 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:24:58,181 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 [2018-06-25 01:24:58,190 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 01:24:58,247 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 01:24:58,248 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:24:58,250 INFO ]: Computing forward predicates... [2018-06-25 01:24:58,788 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:24:58,818 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:24:58,845 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:25:17,173 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 12 [2018-06-25 01:25:18,135 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:25:18,164 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:25:18,164 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-25 01:25:18,164 INFO ]: Interpolant automaton has 9 states [2018-06-25 01:25:18,164 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 01:25:18,164 INFO ]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-25 01:25:18,165 INFO ]: Start difference. First operand 11 states and 16 transitions. Second operand 9 states. [2018-06-25 01:25:18,336 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:25:18,336 INFO ]: Finished difference Result 21 states and 26 transitions. [2018-06-25 01:25:18,336 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 01:25:18,336 INFO ]: Start accepts. Automaton has 9 states. Word has length 9 [2018-06-25 01:25:18,336 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:25:18,336 INFO ]: With dead ends: 21 [2018-06-25 01:25:18,336 INFO ]: Without dead ends: 21 [2018-06-25 01:25:18,337 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-06-25 01:25:18,337 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-25 01:25:18,338 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 11. [2018-06-25 01:25:18,338 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 01:25:18,338 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2018-06-25 01:25:18,338 INFO ]: Start accepts. Automaton has 11 states and 16 transitions. Word has length 9 [2018-06-25 01:25:18,339 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:25:18,339 INFO ]: Abstraction has 11 states and 16 transitions. [2018-06-25 01:25:18,339 INFO ]: Interpolant automaton has 9 states. [2018-06-25 01:25:18,339 INFO ]: Start isEmpty. Operand 11 states and 16 transitions. [2018-06-25 01:25:18,339 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:25:18,339 INFO ]: Found error trace [2018-06-25 01:25:18,339 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:25:18,339 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:25:18,339 INFO ]: Analyzing trace with hash 624058852, now seen corresponding path program 1 times [2018-06-25 01:25:18,339 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:25:18,339 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:25:18,340 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:25:18,340 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:25:18,340 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:25:18,389 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:25:18,660 WARN ]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 01:25:19,049 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-25 01:25:19,163 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:25:19,163 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:25:19,163 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 [2018-06-25 01:25:19,170 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:25:19,220 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:25:19,223 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 01:25:20,253 INFO ]: Timeout while computing interpolants [2018-06-25 01:25:20,453 WARN ]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:25:20,453 WARN ]: Verification canceled [2018-06-25 01:25:20,455 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:25:20,456 WARN ]: Timeout [2018-06-25 01:25:20,456 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:25:20 BasicIcfg [2018-06-25 01:25:20,456 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:25:20,457 INFO ]: Toolchain (without parser) took 63074.25 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 254.7 MB in the beginning and 691.3 MB in the end (delta: -436.6 MB). Peak memory consumption was 769.8 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,457 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:25:20,458 INFO ]: ChcToBoogie took 63.46 ms. Allocated memory is still 308.3 MB. Free memory was 253.7 MB in the beginning and 251.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,458 INFO ]: Boogie Preprocessor took 39.48 ms. Allocated memory is still 308.3 MB. Free memory was 251.7 MB in the beginning and 249.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,459 INFO ]: RCFGBuilder took 219.67 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 236.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,459 INFO ]: BlockEncodingV2 took 302.81 ms. Allocated memory is still 308.3 MB. Free memory was 236.7 MB in the beginning and 224.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,460 INFO ]: TraceAbstraction took 62439.70 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 224.8 MB in the beginning and 691.3 MB in the end (delta: -466.5 MB). Peak memory consumption was 739.9 MB. Max. memory is 3.6 GB. [2018-06-25 01:25:20,463 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 11 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 63.46 ms. Allocated memory is still 308.3 MB. Free memory was 253.7 MB in the beginning and 251.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.48 ms. Allocated memory is still 308.3 MB. Free memory was 251.7 MB in the beginning and 249.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 219.67 ms. Allocated memory is still 308.3 MB. Free memory was 249.7 MB in the beginning and 236.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 302.81 ms. Allocated memory is still 308.3 MB. Free memory was 236.7 MB in the beginning and 224.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62439.70 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 224.8 MB in the beginning and 691.3 MB in the end (delta: -466.5 MB). Peak memory consumption was 739.9 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 Cancelled while BasicCegarLoop was analyzing trace of length 10 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 2790 quantified variables from 17 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 62.3s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 101 SDtfs, 0 SDslu, 87 SDs, 0 SdLazy, 124 SolverSat, 113 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 45 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 56.1s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 3676 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1828 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 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/sendmail-mime-fromqp.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-25-20-474.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-mime-fromqp.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-25-20-474.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-mime-fromqp.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-25-20-474.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-mime-fromqp.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-25-20-474.csv Completed graceful shutdown