java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:06:31,516 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:06:31,518 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:06:31,534 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:06:31,535 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:06:31,538 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:06:31,540 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:06:31,542 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:06:31,544 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:06:31,545 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:06:31,546 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:06:31,546 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:06:31,547 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:06:31,548 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:06:31,549 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:06:31,550 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:06:31,552 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:06:31,556 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:06:31,557 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:06:31,558 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:06:31,559 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:06:31,562 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:06:31,562 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:06:31,562 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:06:31,563 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:06:31,564 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:06:31,565 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:06:31,565 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:06:31,566 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:06:31,567 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:06:31,567 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:06:31,568 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:06:31,568 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:06:31,569 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:06:31,570 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:06:31,570 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:06:31,588 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:06:31,588 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:06:31,590 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:06:31,591 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:06:31,591 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:06:31,592 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:06:31,592 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:06:31,592 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:06:31,592 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:06:31,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:06:31,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:06:31,593 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:06:31,593 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:06:31,593 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:06:31,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:06:31,595 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:06:31,596 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:06:31,596 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:06:31,596 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:06:31,597 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:06:31,597 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:06:31,653 INFO ]: Repository-Root is: /tmp [2018-06-22 11:06:31,670 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:06:31,677 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:06:31,678 INFO ]: Initializing SmtParser... [2018-06-22 11:06:31,679 INFO ]: SmtParser initialized [2018-06-22 11:06:31,679 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 [2018-06-22 11:06:31,681 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 11:06:31,800 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 unknown [2018-06-22 11:06:32,028 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 [2018-06-22 11:06:32,036 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:06:32,041 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:06:32,042 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:06:32,042 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:06:32,042 INFO ]: ChcToBoogie initialized [2018-06-22 11:06:32,045 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,092 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32 Unit [2018-06-22 11:06:32,092 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:06:32,094 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:06:32,094 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:06:32,094 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:06:32,117 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,118 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,125 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,125 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,130 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,132 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,133 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (1/1) ... [2018-06-22 11:06:32,135 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:06:32,136 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:06:32,136 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:06:32,136 INFO ]: RCFGBuilder initialized [2018-06-22 11:06:32,136 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (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 11:06:32,152 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:06:32,152 INFO ]: Found specification of procedure False [2018-06-22 11:06:32,152 INFO ]: Found implementation of procedure False [2018-06-22 11:06:32,152 INFO ]: Specification and implementation of procedure inv_main32 given in one single declaration [2018-06-22 11:06:32,152 INFO ]: Found specification of procedure inv_main32 [2018-06-22 11:06:32,152 INFO ]: Found implementation of procedure inv_main32 [2018-06-22 11:06:32,153 INFO ]: Specification and implementation of procedure inv_main21 given in one single declaration [2018-06-22 11:06:32,153 INFO ]: Found specification of procedure inv_main21 [2018-06-22 11:06:32,153 INFO ]: Found implementation of procedure inv_main21 [2018-06-22 11:06:32,153 INFO ]: Specification and implementation of procedure inv_main3 given in one single declaration [2018-06-22 11:06:32,153 INFO ]: Found specification of procedure inv_main3 [2018-06-22 11:06:32,153 INFO ]: Found implementation of procedure inv_main3 [2018-06-22 11:06:32,153 INFO ]: Specification and implementation of procedure inv_main9 given in one single declaration [2018-06-22 11:06:32,153 INFO ]: Found specification of procedure inv_main9 [2018-06-22 11:06:32,153 INFO ]: Found implementation of procedure inv_main9 [2018-06-22 11:06:32,153 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:06:32,153 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:06:32,153 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 11:06:32,561 INFO ]: Using library mode [2018-06-22 11:06:32,562 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:06:32 BoogieIcfgContainer [2018-06-22 11:06:32,562 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:06:32,563 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:06:32,563 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:06:32,566 INFO ]: TraceAbstraction initialized [2018-06-22 11:06:32,567 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:06:32" (1/3) ... [2018-06-22 11:06:32,568 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0121c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:06:32, skipping insertion in model container [2018-06-22 11:06:32,568 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:06:32" (2/3) ... [2018-06-22 11:06:32,568 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0121c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:06:32, skipping insertion in model container [2018-06-22 11:06:32,568 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:06:32" (3/3) ... [2018-06-22 11:06:32,570 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:06:32,580 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:06:32,587 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:06:32,622 INFO ]: Using default assertion order modulation [2018-06-22 11:06:32,622 INFO ]: Interprodecural is true [2018-06-22 11:06:32,622 INFO ]: Hoare is false [2018-06-22 11:06:32,622 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:06:32,622 INFO ]: Backedges is TWOTRACK [2018-06-22 11:06:32,623 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:06:32,623 INFO ]: Difference is false [2018-06-22 11:06:32,623 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:06:32,623 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:06:32,637 INFO ]: Start isEmpty. Operand 29 states. [2018-06-22 11:06:32,657 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:06:32,658 INFO ]: Found error trace [2018-06-22 11:06:32,658 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:32,660 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:32,665 INFO ]: Analyzing trace with hash 100930383, now seen corresponding path program 1 times [2018-06-22 11:06:32,667 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:32,667 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:32,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:32,708 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:32,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:32,739 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:32,844 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:06:32,846 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:06:32,846 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 11:06:32,849 INFO ]: Interpolant automaton has 5 states [2018-06-22 11:06:32,859 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 11:06:32,859 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:06:32,861 INFO ]: Start difference. First operand 29 states. Second operand 5 states. [2018-06-22 11:06:32,961 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:32,961 INFO ]: Finished difference Result 31 states and 42 transitions. [2018-06-22 11:06:32,962 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:06:32,963 INFO ]: Start accepts. Automaton has 5 states. Word has length 17 [2018-06-22 11:06:32,964 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:32,975 INFO ]: With dead ends: 31 [2018-06-22 11:06:32,975 INFO ]: Without dead ends: 29 [2018-06-22 11:06:32,976 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:06:32,991 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 11:06:33,032 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 11:06:33,034 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 11:06:33,035 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-06-22 11:06:33,037 INFO ]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2018-06-22 11:06:33,038 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:33,038 INFO ]: Abstraction has 29 states and 39 transitions. [2018-06-22 11:06:33,038 INFO ]: Interpolant automaton has 5 states. [2018-06-22 11:06:33,039 INFO ]: Start isEmpty. Operand 29 states and 39 transitions. [2018-06-22 11:06:33,040 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:06:33,041 INFO ]: Found error trace [2018-06-22 11:06:33,041 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:33,041 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:33,042 INFO ]: Analyzing trace with hash -1226982751, now seen corresponding path program 1 times [2018-06-22 11:06:33,042 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:33,042 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:33,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:33,043 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:33,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:33,055 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:33,114 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:06:33,114 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:06:33,114 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:06:33,121 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:06:33,121 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:06:33,121 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:06:33,122 INFO ]: Start difference. First operand 29 states and 39 transitions. Second operand 4 states. [2018-06-22 11:06:33,588 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:33,588 INFO ]: Finished difference Result 33 states and 46 transitions. [2018-06-22 11:06:33,590 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:06:33,590 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 11:06:33,590 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:33,591 INFO ]: With dead ends: 33 [2018-06-22 11:06:33,591 INFO ]: Without dead ends: 30 [2018-06-22 11:06:33,592 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:06:33,592 INFO ]: Start minimizeSevpa. Operand 30 states. [2018-06-22 11:06:33,603 INFO ]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-06-22 11:06:33,603 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:06:33,604 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2018-06-22 11:06:33,605 INFO ]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2018-06-22 11:06:33,605 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:33,605 INFO ]: Abstraction has 30 states and 41 transitions. [2018-06-22 11:06:33,605 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:06:33,605 INFO ]: Start isEmpty. Operand 30 states and 41 transitions. [2018-06-22 11:06:33,607 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:06:33,607 INFO ]: Found error trace [2018-06-22 11:06:33,607 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:33,608 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:33,608 INFO ]: Analyzing trace with hash -1761262289, now seen corresponding path program 1 times [2018-06-22 11:06:33,608 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:33,608 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:33,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:33,609 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:33,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:33,621 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:06:34,058 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:06:34,058 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:06:34,058 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 11:06:34,058 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:06:34,058 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:06:34,059 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:06:34,059 INFO ]: Start difference. First operand 30 states and 41 transitions. Second operand 7 states. [2018-06-22 11:06:34,320 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:06:34,320 INFO ]: Finished difference Result 40 states and 54 transitions. [2018-06-22 11:06:34,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:06:34,320 INFO ]: Start accepts. Automaton has 7 states. Word has length 21 [2018-06-22 11:06:34,321 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:06:34,322 INFO ]: With dead ends: 40 [2018-06-22 11:06:34,322 INFO ]: Without dead ends: 36 [2018-06-22 11:06:34,322 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:06:34,322 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 11:06:34,330 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-06-22 11:06:34,330 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 11:06:34,331 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-06-22 11:06:34,331 INFO ]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 21 [2018-06-22 11:06:34,331 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:06:34,331 INFO ]: Abstraction has 34 states and 46 transitions. [2018-06-22 11:06:34,332 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:06:34,332 INFO ]: Start isEmpty. Operand 34 states and 46 transitions. [2018-06-22 11:06:34,332 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:06:34,332 INFO ]: Found error trace [2018-06-22 11:06:34,332 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:06:34,332 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:06:34,333 INFO ]: Analyzing trace with hash 188443793, now seen corresponding path program 1 times [2018-06-22 11:06:34,333 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:06:34,333 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:06:34,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:34,334 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:06:34,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:06:34,348 INFO ]: Conjunction of SSA is sat [2018-06-22 11:06:34,350 INFO ]: Counterexample might be feasible [2018-06-22 11:06:34,364 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:06:34 BoogieIcfgContainer [2018-06-22 11:06:34,365 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:06:34,365 INFO ]: Toolchain (without parser) took 2329.45 ms. Allocated memory is still 308.8 MB. Free memory was 263.4 MB in the beginning and 201.3 MB in the end (delta: 62.0 MB). Peak memory consumption was 62.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:34,367 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 273.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:06:34,368 INFO ]: ChcToBoogie took 51.69 ms. Allocated memory is still 308.8 MB. Free memory was 263.4 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:34,368 INFO ]: Boogie Preprocessor took 41.14 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:34,369 INFO ]: RCFGBuilder took 426.31 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 251.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:34,369 INFO ]: TraceAbstraction took 1801.36 ms. Allocated memory is still 308.8 MB. Free memory was 251.4 MB in the beginning and 201.3 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:06:34,373 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 273.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.69 ms. Allocated memory is still 308.8 MB. Free memory was 263.4 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.14 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 426.31 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 251.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1801.36 ms. Allocated memory is still 308.8 MB. Free memory was 251.4 MB in the beginning and 201.3 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [UNKNOWN] : assertion can be violated assertion can be violated We found a FailurePath: [L0] CALL call False(); [L0] assume !(hbv_False_1_Int == hbv_False_2_Int); [L0] CALL call inv_main32(hbv_False_3_Int, hbv_False_4_Int, hbv_False_1_Int, hbv_False_2_Int); [L0] assume !(hbv_inv_main32_3_Int == 0) && !(!(hbv_inv_main32_1_Int == 0) && 0 <= hbv_inv_main32_2_Int + -1); [L0] CALL call inv_main21(hhv_inv_main32_0_Int, hhv_inv_main32_1_Int, hhv_inv_main32_2_Int, hbv_inv_main32_4_Int, hbv_inv_main32_2_Int, hhv_inv_main32_3_Int); [L0] assume ((hhv_inv_main21_3_Int == hhv_inv_main21_0_Int && !(0 <= hbv_inv_main21_1_Int + -1 && !(hbv_inv_main21_2_Int == 0))) && hhv_inv_main21_4_Int == hhv_inv_main21_1_Int) && hhv_inv_main21_5_Int == 0; [L0] CALL call inv_main9(hhv_inv_main21_0_Int, hhv_inv_main21_1_Int, hbv_inv_main21_3_Int, hbv_inv_main21_1_Int, hhv_inv_main21_2_Int); [L0] assume ((hhv_inv_main9_4_Int == hbv_inv_main9_3_Int + 1 && hhv_inv_main9_3_Int == hbv_inv_main9_1_Int + -1) && 0 <= hbv_inv_main9_1_Int + -1) && !(hbv_inv_main9_2_Int == 0); [L0] CALL call inv_main9(hhv_inv_main9_0_Int, hhv_inv_main9_1_Int, hhv_inv_main9_2_Int, hbv_inv_main9_1_Int, hbv_inv_main9_3_Int); [L0] assume ((hhv_inv_main9_2_Int == hhv_inv_main9_0_Int && 0 <= hhv_inv_main9_0_Int + -1) && hhv_inv_main9_3_Int == hhv_inv_main9_1_Int) && hhv_inv_main9_4_Int == 0; [L0] CALL call inv_main3(hhv_inv_main9_0_Int, hhv_inv_main9_1_Int); [L0] assume true; [L0] RET call inv_main3(hhv_inv_main9_0_Int, hhv_inv_main9_1_Int); [L0] RET call inv_main9(hhv_inv_main9_0_Int, hhv_inv_main9_1_Int, hhv_inv_main9_2_Int, hbv_inv_main9_1_Int, hbv_inv_main9_3_Int); [L0] RET call inv_main9(hhv_inv_main21_0_Int, hhv_inv_main21_1_Int, hbv_inv_main21_3_Int, hbv_inv_main21_1_Int, hhv_inv_main21_2_Int); [L0] RET call inv_main21(hhv_inv_main32_0_Int, hhv_inv_main32_1_Int, hhv_inv_main32_2_Int, hbv_inv_main32_4_Int, hbv_inv_main32_2_Int, hhv_inv_main32_3_Int); [L0] RET call inv_main32(hbv_False_3_Int, hbv_False_4_Int, hbv_False_1_Int, hbv_False_2_Int); [L0] RET call False(); [L0] assert false; - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. UNSAFE Result, 1.7s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 97 SDtfs, 6 SDslu, 257 SDs, 0 SdLazy, 100 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 2044 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/while-if_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-06-34-384.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/while-if_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-06-34-384.csv Received shutdown request...