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/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:18:00,673 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:18:00,675 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:18:00,688 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:18:00,688 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:18:00,690 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:18:00,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:18:00,695 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:18:00,696 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:18:00,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:18:00,699 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:18:00,699 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:18:00,700 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:18:00,700 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:18:00,703 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:18:00,704 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:18:00,706 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:18:00,716 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:18:00,717 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:18:00,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:18:00,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:18:00,723 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:18:00,723 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:18:00,724 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:18:00,724 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:18:00,725 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:18:00,728 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:18:00,728 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:18:00,729 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... 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[2018-06-22 01:18:00,737 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:18:00,757 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:18:00,757 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:18:00,757 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:18:00,757 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:18:00,758 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:18:00,759 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:18:00,759 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:18:00,759 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:18:00,759 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:18:00,759 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:18:00,762 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:18:00,763 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:18:00,765 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:18:00,765 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:18:00,811 INFO ]: Repository-Root is: /tmp [2018-06-22 01:18:00,827 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:18:00,831 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:18:00,833 INFO ]: Initializing SmtParser... [2018-06-22 01:18:00,833 INFO ]: SmtParser initialized [2018-06-22 01:18:00,833 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 [2018-06-22 01:18:00,835 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 01:18:00,923 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 unknown [2018-06-22 01:18:01,103 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while-if_safe.c-1.smt2 [2018-06-22 01:18:01,107 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:18:01,112 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:18:01,113 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:18:01,113 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:18:01,113 INFO ]: ChcToBoogie initialized [2018-06-22 01:18:01,117 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,175 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01 Unit [2018-06-22 01:18:01,175 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:18:01,175 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:18:01,175 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:18:01,175 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:18:01,197 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,197 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,203 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,203 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,207 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,208 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,211 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... [2018-06-22 01:18:01,212 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:18:01,213 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:18:01,213 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:18:01,213 INFO ]: RCFGBuilder initialized [2018-06-22 01:18:01,217 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 01:18:01,232 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:18:01,233 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:18:01,233 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:18:01,233 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:18:01,233 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:18:01,233 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:18:01,582 INFO ]: Using library mode [2018-06-22 01:18:01,583 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:18:01 BoogieIcfgContainer [2018-06-22 01:18:01,583 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:18:01,586 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:18:01,586 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:18:01,589 INFO ]: TraceAbstraction initialized [2018-06-22 01:18:01,589 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:18:01" (1/3) ... [2018-06-22 01:18:01,590 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577d761a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:18:01, skipping insertion in model container [2018-06-22 01:18:01,590 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:18:01" (2/3) ... [2018-06-22 01:18:01,590 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577d761a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:18:01, skipping insertion in model container [2018-06-22 01:18:01,590 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:18:01" (3/3) ... [2018-06-22 01:18:01,592 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:18:01,602 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:18:01,610 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:18:01,647 INFO ]: Using default assertion order modulation [2018-06-22 01:18:01,648 INFO ]: Interprodecural is true [2018-06-22 01:18:01,648 INFO ]: Hoare is false [2018-06-22 01:18:01,648 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:18:01,648 INFO ]: Backedges is TWOTRACK [2018-06-22 01:18:01,648 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:18:01,648 INFO ]: Difference is false [2018-06-22 01:18:01,648 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:18:01,648 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:18:01,664 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 01:18:01,677 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 01:18:01,677 INFO ]: Found error trace [2018-06-22 01:18:01,681 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:01,682 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:01,687 INFO ]: Analyzing trace with hash 1121939826, now seen corresponding path program 1 times [2018-06-22 01:18:01,688 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:01,689 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:01,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,722 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:01,722 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,758 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:01,872 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:01,875 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:18:01,875 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:18:01,877 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:18:01,887 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:18:01,888 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:18:01,889 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 01:18:01,995 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:01,995 INFO ]: Finished difference Result 16 states and 23 transitions. [2018-06-22 01:18:01,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:18:01,996 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 01:18:01,996 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:02,005 INFO ]: With dead ends: 16 [2018-06-22 01:18:02,005 INFO ]: Without dead ends: 16 [2018-06-22 01:18:02,007 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:18:02,022 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 01:18:02,040 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-06-22 01:18:02,041 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 01:18:02,042 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2018-06-22 01:18:02,045 INFO ]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 9 [2018-06-22 01:18:02,045 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:02,046 INFO ]: Abstraction has 12 states and 18 transitions. [2018-06-22 01:18:02,046 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:18:02,046 INFO ]: Start isEmpty. Operand 12 states and 18 transitions. [2018-06-22 01:18:02,046 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 01:18:02,046 INFO ]: Found error trace [2018-06-22 01:18:02,046 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:02,046 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:02,046 INFO ]: Analyzing trace with hash 594727561, now seen corresponding path program 1 times [2018-06-22 01:18:02,046 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:02,046 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:02,047 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,047 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:02,047 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,065 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,179 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:02,179 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:18:02,179 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:18:02,181 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:18:02,181 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:18:02,181 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:18:02,181 INFO ]: Start difference. First operand 12 states and 18 transitions. Second operand 5 states. [2018-06-22 01:18:02,419 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:02,419 INFO ]: Finished difference Result 17 states and 24 transitions. [2018-06-22 01:18:02,419 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:18:02,419 INFO ]: Start accepts. Automaton has 5 states. Word has length 10 [2018-06-22 01:18:02,419 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:02,420 INFO ]: With dead ends: 17 [2018-06-22 01:18:02,420 INFO ]: Without dead ends: 17 [2018-06-22 01:18:02,420 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:18:02,421 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 01:18:02,422 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-06-22 01:18:02,423 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 01:18:02,423 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2018-06-22 01:18:02,423 INFO ]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2018-06-22 01:18:02,423 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:02,423 INFO ]: Abstraction has 13 states and 19 transitions. [2018-06-22 01:18:02,423 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:18:02,423 INFO ]: Start isEmpty. Operand 13 states and 19 transitions. [2018-06-22 01:18:02,424 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 01:18:02,424 INFO ]: Found error trace [2018-06-22 01:18:02,424 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:02,424 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:02,424 INFO ]: Analyzing trace with hash 298277320, now seen corresponding path program 1 times [2018-06-22 01:18:02,424 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:02,424 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:02,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,425 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:02,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,451 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,594 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:02,594 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:18:02,594 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:18:02,595 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:18:02,595 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:18:02,595 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:18:02,595 INFO ]: Start difference. First operand 13 states and 19 transitions. Second operand 3 states. [2018-06-22 01:18:02,706 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:02,706 INFO ]: Finished difference Result 17 states and 23 transitions. [2018-06-22 01:18:02,708 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:18:02,708 INFO ]: Start accepts. Automaton has 3 states. Word has length 10 [2018-06-22 01:18:02,708 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:02,709 INFO ]: With dead ends: 17 [2018-06-22 01:18:02,709 INFO ]: Without dead ends: 17 [2018-06-22 01:18:02,709 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 01:18:02,709 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 01:18:02,711 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-06-22 01:18:02,711 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 01:18:02,711 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2018-06-22 01:18:02,711 INFO ]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2018-06-22 01:18:02,712 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:02,712 INFO ]: Abstraction has 13 states and 18 transitions. [2018-06-22 01:18:02,712 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:18:02,712 INFO ]: Start isEmpty. Operand 13 states and 18 transitions. [2018-06-22 01:18:02,712 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 01:18:02,712 INFO ]: Found error trace [2018-06-22 01:18:02,712 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:02,712 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:02,712 INFO ]: Analyzing trace with hash 1316499926, now seen corresponding path program 1 times [2018-06-22 01:18:02,712 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:02,712 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:02,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,715 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:02,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,743 INFO ]: Conjunction of SSA is sat [2018-06-22 01:18:02,749 INFO ]: Counterexample might be feasible [2018-06-22 01:18:02,768 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:18:02 BoogieIcfgContainer [2018-06-22 01:18:02,768 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:18:02,769 INFO ]: Toolchain (without parser) took 1661.36 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 217.8 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:02,771 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:18:02,771 INFO ]: ChcToBoogie took 62.22 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:02,773 INFO ]: Boogie Preprocessor took 36.98 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:02,774 INFO ]: RCFGBuilder took 371.87 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 249.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:02,775 INFO ]: TraceAbstraction took 1182.54 ms. Allocated memory is still 309.3 MB. Free memory was 249.7 MB in the beginning and 217.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:02,779 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 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 62.22 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.98 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 371.87 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 249.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1182.54 ms. Allocated memory is still 309.3 MB. Free memory was 249.7 MB in the beginning and 217.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 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 gotoProc(0, 0, 0, 0, 0, 0, 0); [L0] gotoSwitch := gotoSwitch_in; [L0] assume !(hbv_False_1_Int == hbv_False_2_Int); [L0] hhv_inv_main32_0_Int, hhv_inv_main32_1_Int, hhv_inv_main32_2_Int, hhv_inv_main32_3_Int := hbv_False_3_Int, hbv_False_4_Int, hbv_False_1_Int, hbv_False_2_Int; [L0] havoc hbv_False_2_Int, hbv_False_4_Int, hbv_False_3_Int, hbv_False_1_Int; [L0] assume !(hbv_inv_main32_3_Int == 0) && !(!(hbv_inv_main32_1_Int == 0) && 0 <= hbv_inv_main32_2_Int + -1); [L0] hhv_inv_main21_0_Int, hhv_inv_main21_1_Int, hhv_inv_main21_2_Int, hhv_inv_main21_3_Int, hhv_inv_main21_4_Int, hhv_inv_main21_5_Int := 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] havoc hbv_inv_main32_1_Int, hbv_inv_main32_4_Int, hbv_inv_main32_2_Int, hbv_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] hhv_inv_main9_0_Int, hhv_inv_main9_1_Int, hhv_inv_main9_2_Int, hhv_inv_main9_3_Int, hhv_inv_main9_4_Int := 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] havoc hbv_inv_main21_1_Int, hbv_inv_main21_3_Int, hbv_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] hhv_inv_main9_0_Int, hhv_inv_main9_1_Int, hhv_inv_main9_2_Int, hhv_inv_main9_3_Int, hhv_inv_main9_4_Int := 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] havoc hbv_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] hhv_inv_main3_0_Int, hhv_inv_main3_1_Int := hhv_inv_main9_0_Int, hhv_inv_main9_1_Int; [L0] assume true; [L0] RET call gotoProc(0, 0, 0, 0, 0, 0, 0); [L0] assert false; - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. UNSAFE Result, 1.1s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 43 SDslu, 49 SDs, 0 SdLazy, 33 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, 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, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-18-02-792.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/while-if_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-18-02-792.csv Received shutdown request...