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/vmt-chc-benchmarks/cav12/simple_array_inversion-5.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:25:39,775 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:25:39,776 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:25:39,787 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:25:39,787 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:25:39,788 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:25:39,790 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:25:39,795 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:25:39,797 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:25:39,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:25:39,798 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:25:39,798 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:25:39,799 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:25:39,800 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:25:39,801 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:25:39,802 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:25:39,803 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:25:39,805 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:25:39,806 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:25:39,807 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:25:39,809 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:25:39,811 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:25:39,811 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:25:39,811 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:25:39,812 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:25:39,813 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:25:39,814 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:25:39,815 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:25:39,819 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:25:39,819 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:25:39,820 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:25:39,821 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:25:39,821 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:25:39,822 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:25:39,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:25:39,822 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 14:25:39,843 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:25:39,844 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:25:39,844 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:25:39,844 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:25:39,845 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:25:39,845 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:25:39,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:25:39,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:25:39,846 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:25:39,846 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:25:39,847 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:25:39,847 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:25:39,847 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:25:39,847 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:25:39,847 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:25:39,847 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:25:39,848 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:25:39,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:25:39,848 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:25:39,849 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:25:39,849 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:25:39,902 INFO ]: Repository-Root is: /tmp [2018-06-22 14:25:39,918 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:25:39,923 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:25:39,924 INFO ]: Initializing SmtParser... [2018-06-22 14:25:39,925 INFO ]: SmtParser initialized [2018-06-22 14:25:39,926 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-5.smt2 [2018-06-22 14:25:39,927 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 14:25:40,019 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-5.smt2 unknown [2018-06-22 14:25:40,643 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-5.smt2 [2018-06-22 14:25:40,648 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:25:40,663 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:25:40,663 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:25:40,663 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:25:40,663 INFO ]: ChcToBoogie initialized [2018-06-22 14:25:40,666 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,772 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40 Unit [2018-06-22 14:25:40,772 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:25:40,772 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:25:40,772 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:25:40,772 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:25:40,794 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,795 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,820 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,820 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,843 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,844 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,849 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... [2018-06-22 14:25:40,856 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:25:40,856 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:25:40,856 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:25:40,856 INFO ]: RCFGBuilder initialized [2018-06-22 14:25:40,857 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:25:40,877 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:25:40,877 INFO ]: Found specification of procedure False [2018-06-22 14:25:40,877 INFO ]: Found implementation of procedure False [2018-06-22 14:25:40,877 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:25:40,877 INFO ]: Found specification of procedure state [2018-06-22 14:25:40,877 INFO ]: Found implementation of procedure state [2018-06-22 14:25:40,877 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:25:40,877 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:25:40,877 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:25:41,330 INFO ]: Using library mode [2018-06-22 14:25:41,331 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:25:41 BoogieIcfgContainer [2018-06-22 14:25:41,331 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:25:41,333 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:25:41,333 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:25:41,339 INFO ]: TraceAbstraction initialized [2018-06-22 14:25:41,339 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:25:40" (1/3) ... [2018-06-22 14:25:41,340 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758eb236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:25:41, skipping insertion in model container [2018-06-22 14:25:41,340 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:25:40" (2/3) ... [2018-06-22 14:25:41,341 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758eb236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:25:41, skipping insertion in model container [2018-06-22 14:25:41,341 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:25:41" (3/3) ... [2018-06-22 14:25:41,343 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:25:41,353 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:25:41,363 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:25:41,432 INFO ]: Using default assertion order modulation [2018-06-22 14:25:41,433 INFO ]: Interprodecural is true [2018-06-22 14:25:41,433 INFO ]: Hoare is false [2018-06-22 14:25:41,433 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:25:41,433 INFO ]: Backedges is TWOTRACK [2018-06-22 14:25:41,433 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:25:41,433 INFO ]: Difference is false [2018-06-22 14:25:41,433 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:25:41,433 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:25:41,450 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:25:41,465 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:25:41,465 INFO ]: Found error trace [2018-06-22 14:25:41,466 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:25:41,466 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:25:41,472 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:25:41,474 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:25:41,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:25:41,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:41,523 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:25:41,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:41,575 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:41,781 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:25:41,784 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:25:41,784 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:25:41,786 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:25:41,801 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:25:41,802 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:25:41,804 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:25:41,957 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:25:41,957 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:25:41,958 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:25:41,959 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:25:41,959 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:25:41,971 INFO ]: With dead ends: 13 [2018-06-22 14:25:41,971 INFO ]: Without dead ends: 13 [2018-06-22 14:25:41,973 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:25:41,991 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:25:42,027 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:25:42,028 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:25:42,029 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:25:42,031 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:25:42,031 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:25:42,031 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:25:42,031 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:25:42,031 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:25:42,032 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:25:42,032 INFO ]: Found error trace [2018-06-22 14:25:42,033 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:25:42,033 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:25:42,033 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:25:42,033 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:25:42,033 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:25:42,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:42,034 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:25:42,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:42,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:42,539 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:25:42,705 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:25:42,706 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:25:42,706 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 14:25:42,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:25:42,810 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:42,822 INFO ]: Computing forward predicates... [2018-06-22 14:25:44,568 WARN ]: Spent 837.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-06-22 14:25:44,725 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:25:44,745 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:25:44,745 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:25:44,746 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:25:44,746 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:25:44,746 INFO ]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:25:44,746 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:25:45,338 WARN ]: Spent 493.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-06-22 14:25:45,393 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:25:45,393 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:25:45,393 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:25:45,393 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:25:45,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:25:45,394 INFO ]: With dead ends: 15 [2018-06-22 14:25:45,394 INFO ]: Without dead ends: 15 [2018-06-22 14:25:45,395 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:25:45,395 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:25:45,398 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:25:45,398 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:25:45,398 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:25:45,398 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:25:45,399 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:25:45,399 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:25:45,399 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:25:45,399 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:25:45,399 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:25:45,399 INFO ]: Found error trace [2018-06-22 14:25:45,399 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:25:45,399 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:25:45,400 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:25:45,400 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:25:45,400 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:25:45,400 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:45,400 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:25:45,400 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:45,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:45,782 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:25:45,782 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:25:45,802 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 14:25:45,808 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:25:45,923 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:25:45,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:45,939 INFO ]: Computing forward predicates... [2018-06-22 14:25:47,134 WARN ]: Spent 552.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-06-22 14:25:48,103 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 14:25:48,136 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:25:48,136 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2018-06-22 14:25:48,136 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:25:48,136 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:25:48,137 INFO ]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:25:48,137 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:25:48,354 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-06-22 14:25:48,587 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:25:48,587 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:25:48,590 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:25:48,590 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:25:48,590 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:25:48,591 INFO ]: With dead ends: 17 [2018-06-22 14:25:48,591 INFO ]: Without dead ends: 17 [2018-06-22 14:25:48,591 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:25:48,592 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:25:48,594 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:25:48,594 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:25:48,595 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:25:48,595 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:25:48,595 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:25:48,595 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:25:48,595 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:25:48,595 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:25:48,596 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:25:48,596 INFO ]: Found error trace [2018-06-22 14:25:48,596 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:25:48,596 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:25:48,596 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:25:48,596 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:25:48,596 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:25:48,597 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:48,597 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:25:48,597 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:25:48,770 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:49,417 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2018-06-22 14:25:49,706 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:25:49,707 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:25:49,707 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) [2018-06-22 14:25:49,722 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:25:49,886 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:25:49,886 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:25:49,898 INFO ]: Computing forward predicates... [2018-06-22 14:25:55,348 WARN ]: Spent 2.02 s on a formula simplification. DAG size of input: 155 DAG size of output: 64 [2018-06-22 14:25:58,541 WARN ]: Spent 1.38 s on a formula simplification. DAG size of input: 199 DAG size of output: 79 [2018-06-22 14:26:00,979 WARN ]: Spent 625.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 66 [2018-06-22 14:26:01,522 WARN ]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:26:02,421 WARN ]: Spent 499.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 11 [2018-06-22 14:26:02,958 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-06-22 14:26:02,971 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:26:02,991 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:26:02,991 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:26:02,991 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:26:02,991 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:26:02,992 INFO ]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:26:02,992 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:26:04,247 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 155 DAG size of output: 109 [2018-06-22 14:26:04,452 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 24 [2018-06-22 14:26:04,779 WARN ]: Spent 293.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 42 [2018-06-22 14:26:05,557 WARN ]: Spent 695.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 102 [2018-06-22 14:26:05,593 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:26:05,593 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:26:05,594 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:26:05,594 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:26:05,594 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:26:05,595 INFO ]: With dead ends: 19 [2018-06-22 14:26:05,595 INFO ]: Without dead ends: 19 [2018-06-22 14:26:05,595 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:26:05,596 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:26:05,598 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:26:05,598 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:26:05,599 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:26:05,599 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:26:05,599 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:26:05,599 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:26:05,599 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:26:05,599 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:26:05,600 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:26:05,600 INFO ]: Found error trace [2018-06-22 14:26:05,600 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:26:05,600 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:26:05,600 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:26:05,600 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:26:05,600 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:26:05,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:05,601 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:26:05,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:05,875 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:06,326 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:26:06,894 WARN ]: Spent 522.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-06-22 14:26:07,080 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 33 [2018-06-22 14:26:07,357 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:26:07,357 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:26:07,357 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 14:26:07,363 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:26:07,569 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:26:07,569 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:07,583 INFO ]: Computing forward predicates... [2018-06-22 14:26:07,968 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-06-22 14:26:09,682 WARN ]: Spent 465.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 60 [2018-06-22 14:26:11,478 WARN ]: Spent 690.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 65 [2018-06-22 14:26:13,104 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 66 [2018-06-22 14:26:13,338 INFO ]: Checked inductivity of 36 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:26:13,358 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:26:13,358 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 14:26:13,358 INFO ]: Interpolant automaton has 21 states [2018-06-22 14:26:13,358 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 14:26:13,359 INFO ]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:26:13,359 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 14:26:13,795 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2018-06-22 14:26:14,166 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2018-06-22 14:26:14,475 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2018-06-22 14:26:14,530 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:26:14,530 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:26:14,532 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:26:14,532 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 14:26:14,532 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:26:14,533 INFO ]: With dead ends: 21 [2018-06-22 14:26:14,533 INFO ]: Without dead ends: 21 [2018-06-22 14:26:14,533 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:26:14,533 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:26:14,539 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:26:14,539 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:26:14,541 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:26:14,541 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:26:14,541 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:26:14,542 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:26:14,542 INFO ]: Interpolant automaton has 21 states. [2018-06-22 14:26:14,542 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:26:14,542 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:26:14,542 INFO ]: Found error trace [2018-06-22 14:26:14,542 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:26:14,543 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:26:14,543 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:26:14,543 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:26:14,543 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:26:14,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:14,543 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:26:14,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:14,785 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:15,232 WARN ]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:26:15,472 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2018-06-22 14:26:15,610 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 34 [2018-06-22 14:26:16,046 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:26:16,046 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:26:16,046 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 14:26:16,054 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:26:16,353 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:26:16,353 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:16,380 INFO ]: Computing forward predicates... [2018-06-22 14:26:17,027 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2018-06-22 14:26:19,225 WARN ]: Spent 942.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 82 [2018-06-22 14:26:21,146 WARN ]: Spent 999.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 82 [2018-06-22 14:26:22,853 WARN ]: Spent 728.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 65 [2018-06-22 14:26:24,406 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 66 [2018-06-22 14:26:24,801 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:26:24,822 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:26:24,822 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 14:26:24,823 INFO ]: Interpolant automaton has 24 states [2018-06-22 14:26:24,823 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 14:26:24,824 INFO ]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:26:24,824 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 14:26:25,603 WARN ]: Spent 729.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 102 [2018-06-22 14:26:25,837 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 23 [2018-06-22 14:26:26,002 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 32 [2018-06-22 14:26:26,258 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 35 [2018-06-22 14:26:26,550 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 44 [2018-06-22 14:26:27,112 WARN ]: Spent 371.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 51 [2018-06-22 14:26:27,725 WARN ]: Spent 549.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 96 [2018-06-22 14:26:27,795 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:26:27,796 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:26:27,796 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:26:27,796 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 14:26:27,796 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:26:27,797 INFO ]: With dead ends: 25 [2018-06-22 14:26:27,797 INFO ]: Without dead ends: 25 [2018-06-22 14:26:27,798 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:26:27,798 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:26:27,801 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:26:27,801 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:26:27,802 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:26:27,802 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:26:27,802 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:26:27,802 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:26:27,802 INFO ]: Interpolant automaton has 24 states. [2018-06-22 14:26:27,802 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:26:27,803 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:26:27,803 INFO ]: Found error trace [2018-06-22 14:26:27,803 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:26:27,803 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:26:27,803 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 6 times [2018-06-22 14:26:27,803 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:26:27,803 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:26:27,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:27,804 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:26:27,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:26:28,229 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:30,125 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 175 DAG size of output: 80 [2018-06-22 14:26:30,994 WARN ]: Spent 846.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 106 [2018-06-22 14:26:32,104 WARN ]: Spent 1.04 s on a formula simplification. DAG size of input: 296 DAG size of output: 125 [2018-06-22 14:26:32,728 WARN ]: Spent 595.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 93 [2018-06-22 14:26:33,295 WARN ]: Spent 534.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 105 [2018-06-22 14:26:33,826 WARN ]: Spent 354.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 50 [2018-06-22 14:26:34,126 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 46 [2018-06-22 14:26:34,691 WARN ]: Spent 481.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 49 [2018-06-22 14:26:35,179 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 53 [2018-06-22 14:26:35,197 INFO ]: Checked inductivity of 105 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-06-22 14:26:35,197 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:26:35,197 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:26:35,210 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:26:35,754 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:26:35,754 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:26:35,783 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 14:26:36,795 INFO ]: Timeout while computing interpolants [2018-06-22 14:26:36,995 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:26:36,995 WARN ]: Verification canceled [2018-06-22 14:26:36,999 WARN ]: Timeout [2018-06-22 14:26:36,999 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:26:36 BoogieIcfgContainer [2018-06-22 14:26:36,999 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:26:37,000 INFO ]: Toolchain (without parser) took 56351.50 ms. Allocated memory was 302.5 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 226.9 MB in the beginning and 365.0 MB in the end (delta: -138.1 MB). Peak memory consumption was 967.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:26:37,000 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 302.5 MB. Free memory is still 266.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:26:37,001 INFO ]: ChcToBoogie took 109.03 ms. Allocated memory is still 302.5 MB. Free memory was 226.9 MB in the beginning and 223.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:26:37,001 INFO ]: Boogie Preprocessor took 83.17 ms. Allocated memory is still 302.5 MB. Free memory was 223.9 MB in the beginning and 221.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:26:37,001 INFO ]: RCFGBuilder took 474.92 ms. Allocated memory is still 302.5 MB. Free memory was 221.8 MB in the beginning and 186.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:26:37,003 INFO ]: TraceAbstraction took 55666.48 ms. Allocated memory was 302.5 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 186.7 MB in the beginning and 365.0 MB in the end (delta: -178.3 MB). Peak memory consumption was 926.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:26:37,005 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 302.5 MB. Free memory is still 266.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 109.03 ms. Allocated memory is still 302.5 MB. Free memory was 226.9 MB in the beginning and 223.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 83.17 ms. Allocated memory is still 302.5 MB. Free memory was 223.9 MB in the beginning and 221.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 474.92 ms. Allocated memory is still 302.5 MB. Free memory was 221.8 MB in the beginning and 186.7 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 55666.48 ms. Allocated memory was 302.5 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 186.7 MB in the beginning and 365.0 MB in the end (delta: -178.3 MB). Peak memory consumption was 926.9 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 (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 55.5s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 8.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 71 SDtfs, 135 SDslu, 307 SDs, 0 SdLazy, 264 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 24.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 154712 SizeOfPredicates, 1866 NumberOfNonLiveVariables, 2285 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 75/250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-26-37-014.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-26-37-014.csv Completed graceful shutdown