java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:56:56,691 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:56:56,710 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:56:56,728 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:56:56,729 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:56:56,730 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:56:56,731 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:56:56,733 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:56:56,735 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:56:56,737 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:56:56,738 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:56:56,738 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:56:56,739 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:56:56,744 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:56:56,745 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:56:56,746 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:56:56,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:56:56,761 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:56:56,762 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:56:56,763 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:56:56,764 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:56:56,767 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:56:56,767 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:56:56,767 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:56:56,772 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:56:56,773 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:56:56,774 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:56:56,775 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:56:56,777 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:56:56,778 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:56:56,778 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:56:56,779 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:56:56,779 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:56:56,780 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:56:56,780 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:56:56,781 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:56:56,804 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:56:56,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:56:56,805 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:56:56,805 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:56:56,806 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:56:56,806 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:56:56,806 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:56:56,807 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:56:56,807 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:56:56,807 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:56:56,807 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:56:56,807 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:56:56,808 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:56:56,808 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:56:56,808 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:56:56,808 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:56:56,808 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:56:56,809 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:56:56,810 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:56:56,873 INFO ]: Repository-Root is: /tmp [2018-06-22 05:56:56,916 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:56:56,919 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:56:56,920 INFO ]: Initializing SmtParser... [2018-06-22 05:56:56,920 INFO ]: SmtParser initialized [2018-06-22 05:56:56,921 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple.c.smt2 [2018-06-22 05:56:56,944 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 05:56:57,591 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple.c.smt2 unknown [2018-06-22 05:56:57,846 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/simple.c.smt2 [2018-06-22 05:56:57,852 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:56:57,857 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:56:57,858 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:56:57,858 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:56:57,858 INFO ]: ChcToBoogie initialized [2018-06-22 05:56:57,935 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:56:57" (1/1) ... [2018-06-22 05:56:58,065 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58 Unit [2018-06-22 05:56:58,065 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:56:58,066 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:56:58,066 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:56:58,066 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:56:58,112 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,112 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,118 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,119 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,121 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,123 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,124 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (1/1) ... [2018-06-22 05:56:58,125 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:56:58,126 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:56:58,126 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:56:58,126 INFO ]: RCFGBuilder initialized [2018-06-22 05:56:58,127 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (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 05:56:58,143 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:56:58,143 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:56:58,143 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:56:58,143 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:56:58,143 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:56:58,143 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:56:58,448 INFO ]: Using library mode [2018-06-22 05:56:58,449 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:56:58 BoogieIcfgContainer [2018-06-22 05:56:58,449 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:56:58,455 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:56:58,455 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:56:58,505 INFO ]: TraceAbstraction initialized [2018-06-22 05:56:58,505 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:56:57" (1/3) ... [2018-06-22 05:56:58,506 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9776458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:56:58, skipping insertion in model container [2018-06-22 05:56:58,506 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:56:58" (2/3) ... [2018-06-22 05:56:58,506 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9776458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:56:58, skipping insertion in model container [2018-06-22 05:56:58,506 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:56:58" (3/3) ... [2018-06-22 05:56:58,508 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:56:58,540 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:56:58,566 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:56:58,779 INFO ]: Using default assertion order modulation [2018-06-22 05:56:58,780 INFO ]: Interprodecural is true [2018-06-22 05:56:58,780 INFO ]: Hoare is false [2018-06-22 05:56:58,780 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:56:58,780 INFO ]: Backedges is TWOTRACK [2018-06-22 05:56:58,780 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:56:58,780 INFO ]: Difference is false [2018-06-22 05:56:58,780 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:56:58,780 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:56:58,928 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:56:58,966 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:56:58,966 INFO ]: Found error trace [2018-06-22 05:56:58,987 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:58,987 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:59,160 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:56:59,162 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:59,163 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:59,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:59,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:59,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:59,425 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:59,497 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:59,509 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:56:59,509 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:56:59,511 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:56:59,530 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:56:59,531 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:56:59,535 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:56:59,621 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:56:59,621 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:56:59,622 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:56:59,623 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:56:59,624 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:56:59,631 INFO ]: With dead ends: 9 [2018-06-22 05:56:59,632 INFO ]: Without dead ends: 9 [2018-06-22 05:56:59,633 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:56:59,648 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:56:59,679 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:56:59,681 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:56:59,681 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:56:59,682 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:56:59,682 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:56:59,682 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:56:59,682 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:56:59,682 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:56:59,683 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:56:59,683 INFO ]: Found error trace [2018-06-22 05:56:59,683 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:56:59,683 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:56:59,683 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:56:59,683 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:56:59,683 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:56:59,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:59,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:59,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:56:59,704 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:59,819 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:56:59,819 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:56:59,819 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 05:56:59,827 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:56:59,875 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:56:59,883 INFO ]: Computing forward predicates... [2018-06-22 05:57:00,020 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:00,044 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:00,044 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 05:57:00,045 INFO ]: Interpolant automaton has 4 states [2018-06-22 05:57:00,045 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 05:57:00,045 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 05:57:00,045 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-22 05:57:00,061 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:00,061 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:57:00,062 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:57:00,062 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-22 05:57:00,062 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:00,062 INFO ]: With dead ends: 10 [2018-06-22 05:57:00,062 INFO ]: Without dead ends: 10 [2018-06-22 05:57:00,063 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 05:57:00,063 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:57:00,064 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:57:00,064 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:57:00,065 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:57:00,065 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:57:00,065 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:00,065 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:57:00,065 INFO ]: Interpolant automaton has 4 states. [2018-06-22 05:57:00,065 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:57:00,065 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:57:00,065 INFO ]: Found error trace [2018-06-22 05:57:00,065 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:00,065 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:00,066 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:57:00,066 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:00,066 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:00,067 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:00,068 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:00,068 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:00,097 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:00,252 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:00,252 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:00,252 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 05:57:00,259 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:57:00,318 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:57:00,318 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:00,321 INFO ]: Computing forward predicates... [2018-06-22 05:57:01,351 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:01,385 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:01,385 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:57:01,386 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:57:01,386 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:57:01,386 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:57:01,386 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:57:01,579 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:57:01,629 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:01,629 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:57:01,629 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:57:01,629 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:57:01,629 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:01,629 INFO ]: With dead ends: 11 [2018-06-22 05:57:01,629 INFO ]: Without dead ends: 11 [2018-06-22 05:57:01,630 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:57:01,630 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:57:01,631 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:57:01,631 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:57:01,631 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:57:01,631 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:57:01,631 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:01,632 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:57:01,632 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:57:01,632 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:57:01,632 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:57:01,632 INFO ]: Found error trace [2018-06-22 05:57:01,632 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:01,632 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:01,632 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 05:57:01,632 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:01,632 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:01,633 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:01,633 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:01,633 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:01,673 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:02,079 WARN ]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:57:02,111 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:02,123 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:02,123 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:57:02,129 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:57:02,197 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:57:02,197 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:02,200 INFO ]: Computing forward predicates... [2018-06-22 05:57:03,782 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:03,804 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:03,804 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:57:03,805 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:57:03,805 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:57:03,805 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:57:03,805 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:57:03,964 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:03,964 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:57:03,964 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:57:03,964 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:57:03,964 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:03,965 INFO ]: With dead ends: 12 [2018-06-22 05:57:03,965 INFO ]: Without dead ends: 12 [2018-06-22 05:57:03,965 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:57:03,965 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:57:03,966 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:57:03,966 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:57:03,967 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:57:03,967 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:57:03,967 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:03,967 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:57:03,967 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:57:03,967 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:57:03,967 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:57:03,967 INFO ]: Found error trace [2018-06-22 05:57:03,967 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:03,967 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:03,968 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-22 05:57:03,968 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:03,968 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:03,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:03,968 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:03,968 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:04,028 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:04,399 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:04,399 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:04,399 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 05:57:04,405 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:57:04,428 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:57:04,428 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:04,431 INFO ]: Computing forward predicates... [2018-06-22 05:57:05,091 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 16 [2018-06-22 05:57:07,279 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:07,299 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:07,299 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-22 05:57:07,300 INFO ]: Interpolant automaton has 11 states [2018-06-22 05:57:07,300 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 05:57:07,300 INFO ]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:57:07,300 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-06-22 05:57:07,596 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:57:07,696 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:07,696 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:57:07,696 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:57:07,697 INFO ]: Start accepts. Automaton has 11 states. Word has length 11 [2018-06-22 05:57:07,697 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:07,697 INFO ]: With dead ends: 13 [2018-06-22 05:57:07,697 INFO ]: Without dead ends: 13 [2018-06-22 05:57:07,697 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:57:07,698 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:57:07,699 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:57:07,699 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:57:07,699 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:57:07,699 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:57:07,699 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:07,699 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:57:07,699 INFO ]: Interpolant automaton has 11 states. [2018-06-22 05:57:07,699 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:57:07,700 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:57:07,700 INFO ]: Found error trace [2018-06-22 05:57:07,700 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:07,700 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:07,700 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 5 times [2018-06-22 05:57:07,700 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:07,700 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:07,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:07,701 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:07,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:07,732 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:08,114 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:08,114 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:08,114 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 05:57:08,125 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:57:08,204 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:57:08,204 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:08,207 INFO ]: Computing forward predicates... [2018-06-22 05:57:09,742 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 9 [2018-06-22 05:57:10,090 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:57:11,489 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 16 [2018-06-22 05:57:12,352 WARN ]: Spent 410.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-06-22 05:57:12,465 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:12,496 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:12,496 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 05:57:12,496 INFO ]: Interpolant automaton has 13 states [2018-06-22 05:57:12,497 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 05:57:12,497 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:57:12,497 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-06-22 05:57:13,056 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2018-06-22 05:57:13,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:13,058 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:57:13,058 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:57:13,058 INFO ]: Start accepts. Automaton has 13 states. Word has length 12 [2018-06-22 05:57:13,058 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:13,058 INFO ]: With dead ends: 14 [2018-06-22 05:57:13,058 INFO ]: Without dead ends: 14 [2018-06-22 05:57:13,059 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:57:13,059 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:57:13,060 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:57:13,060 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:57:13,060 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:57:13,060 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:57:13,061 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:13,061 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:57:13,061 INFO ]: Interpolant automaton has 13 states. [2018-06-22 05:57:13,061 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:57:13,061 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:57:13,061 INFO ]: Found error trace [2018-06-22 05:57:13,061 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:13,061 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:13,061 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 6 times [2018-06-22 05:57:13,061 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:13,061 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:13,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:13,062 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:13,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:13,119 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:13,381 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:13,382 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:13,382 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:57:13,408 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:57:13,453 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:57:13,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:13,457 INFO ]: Computing forward predicates... [2018-06-22 05:57:15,789 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:15,811 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:15,811 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-06-22 05:57:15,811 INFO ]: Interpolant automaton has 11 states [2018-06-22 05:57:15,811 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 05:57:15,811 INFO ]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:57:15,811 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-06-22 05:57:16,145 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:16,145 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:57:16,145 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:57:16,145 INFO ]: Start accepts. Automaton has 11 states. Word has length 13 [2018-06-22 05:57:16,145 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:16,146 INFO ]: With dead ends: 15 [2018-06-22 05:57:16,146 INFO ]: Without dead ends: 15 [2018-06-22 05:57:16,146 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:57:16,146 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:57:16,148 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:57:16,148 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:57:16,148 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:57:16,148 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:57:16,148 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:16,148 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:57:16,148 INFO ]: Interpolant automaton has 11 states. [2018-06-22 05:57:16,148 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:57:16,149 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:57:16,149 INFO ]: Found error trace [2018-06-22 05:57:16,149 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:16,149 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:16,149 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 7 times [2018-06-22 05:57:16,149 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:16,149 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:16,150 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:16,150 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:57:16,150 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:16,207 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:16,545 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:16,545 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:16,545 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:57:16,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:16,596 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:16,599 INFO ]: Computing forward predicates... [2018-06-22 05:57:29,898 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 15 [2018-06-22 05:57:30,264 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:57:31,221 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:57:31,913 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:31,940 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:31,940 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 05:57:31,941 INFO ]: Interpolant automaton has 15 states [2018-06-22 05:57:31,941 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 05:57:31,941 INFO ]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:57:31,941 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-06-22 05:57:32,560 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2018-06-22 05:57:32,561 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:32,561 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 05:57:32,561 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 05:57:32,561 INFO ]: Start accepts. Automaton has 15 states. Word has length 14 [2018-06-22 05:57:32,561 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:32,562 INFO ]: With dead ends: 16 [2018-06-22 05:57:32,562 INFO ]: Without dead ends: 16 [2018-06-22 05:57:32,562 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:57:32,562 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 05:57:32,564 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 05:57:32,564 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 05:57:32,591 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 05:57:32,591 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 05:57:32,591 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:32,591 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 05:57:32,591 INFO ]: Interpolant automaton has 15 states. [2018-06-22 05:57:32,591 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 05:57:32,592 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 05:57:32,592 INFO ]: Found error trace [2018-06-22 05:57:32,592 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:57:32,592 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:57:32,592 INFO ]: Analyzing trace with hash 39881678, now seen corresponding path program 8 times [2018-06-22 05:57:32,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:57:32,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:57:32,593 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:32,593 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:57:32,593 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:57:32,635 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:33,530 WARN ]: Spent 646.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-06-22 05:57:34,544 WARN ]: Spent 946.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-22 05:57:34,811 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 05:57:34,901 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:34,901 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:57:34,901 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:57:34,907 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:57:34,965 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:57:34,965 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:57:34,968 INFO ]: Computing forward predicates... [2018-06-22 05:57:46,951 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2018-06-22 05:57:47,617 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:57:47,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:57:47,638 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-06-22 05:57:47,639 INFO ]: Interpolant automaton has 18 states [2018-06-22 05:57:47,639 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 05:57:47,639 INFO ]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:57:47,639 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2018-06-22 05:57:47,890 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2018-06-22 05:57:48,046 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2018-06-22 05:57:48,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:57:48,057 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:57:48,057 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:57:48,057 INFO ]: Start accepts. Automaton has 18 states. Word has length 15 [2018-06-22 05:57:48,057 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:57:48,057 INFO ]: With dead ends: 12 [2018-06-22 05:57:48,057 INFO ]: Without dead ends: 0 [2018-06-22 05:57:48,058 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:57:48,058 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 05:57:48,058 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 05:57:48,058 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 05:57:48,058 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 05:57:48,058 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-06-22 05:57:48,058 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:57:48,058 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 05:57:48,058 INFO ]: Interpolant automaton has 18 states. [2018-06-22 05:57:48,058 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 05:57:48,058 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 05:57:48,062 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:57:48 BoogieIcfgContainer [2018-06-22 05:57:48,063 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:57:48,063 INFO ]: Toolchain (without parser) took 50211.47 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 262.3 MB in the beginning and 886.0 MB in the end (delta: -623.7 MB). Peak memory consumption was 582.1 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:48,064 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 307.8 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:57:48,065 INFO ]: ChcToBoogie took 207.84 ms. Allocated memory is still 307.8 MB. Free memory was 262.3 MB in the beginning and 260.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:48,065 INFO ]: Boogie Preprocessor took 59.49 ms. Allocated memory is still 307.8 MB. Free memory was 260.3 MB in the beginning and 258.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:48,066 INFO ]: RCFGBuilder took 323.02 ms. Allocated memory is still 307.8 MB. Free memory was 258.3 MB in the beginning and 250.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:48,066 INFO ]: TraceAbstraction took 49607.87 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.3 MB in the beginning and 886.0 MB in the end (delta: -635.7 MB). Peak memory consumption was 570.2 MB. Max. memory is 3.6 GB. [2018-06-22 05:57:48,070 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 307.8 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 207.84 ms. Allocated memory is still 307.8 MB. Free memory was 262.3 MB in the beginning and 260.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 59.49 ms. Allocated memory is still 307.8 MB. Free memory was 260.3 MB in the beginning and 258.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 323.02 ms. Allocated memory is still 307.8 MB. Free memory was 258.3 MB in the beginning and 250.3 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 49607.87 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.3 MB in the beginning and 886.0 MB in the end (delta: -635.7 MB). Peak memory consumption was 570.2 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 49.3s OverallTime, 9 OverallIterations, 8 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 26 SDslu, 194 SDs, 0 SdLazy, 77 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=8, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 44.5s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 13374 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1072 ConjunctsInSsa, 332 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 0/240 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-57-48-080.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-57-48-080.csv Received shutdown request...