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/sally-chc-benchmarks/hacms/eventclock6.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:21:26,697 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:21:26,699 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:21:26,712 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:21:26,712 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:21:26,713 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:21:26,717 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:21:26,719 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:21:26,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:21:26,722 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:21:26,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:21:26,723 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:21:26,724 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:21:26,725 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:21:26,726 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:21:26,730 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:21:26,731 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:21:26,733 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:21:26,734 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:21:26,735 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:21:26,736 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:21:26,739 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:21:26,739 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:21:26,739 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:21:26,740 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:21:26,741 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:21:26,741 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:21:26,742 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:21:26,743 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:21:26,743 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:21:26,744 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:21:26,745 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:21:26,745 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:21:26,746 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:21:26,746 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:21:26,746 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 12:21:26,767 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:21:26,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:21:26,767 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:21:26,768 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:21:26,768 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:21:26,769 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:21:26,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:21:26,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:21:26,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:21:26,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:21:26,770 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:21:26,771 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:21:26,771 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:21:26,771 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:21:26,771 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:21:26,771 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:21:26,772 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:21:26,772 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:21:26,772 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:21:26,773 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:21:26,773 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:21:26,816 INFO ]: Repository-Root is: /tmp [2018-06-22 12:21:26,828 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:21:26,832 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:21:26,833 INFO ]: Initializing SmtParser... [2018-06-22 12:21:26,833 INFO ]: SmtParser initialized [2018-06-22 12:21:26,834 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/hacms/eventclock6.smt2 [2018-06-22 12:21:26,835 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 12:21:26,925 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/hacms/eventclock6.smt2 unknown [2018-06-22 12:21:27,190 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/hacms/eventclock6.smt2 [2018-06-22 12:21:27,195 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:21:27,201 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:21:27,202 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:21:27,202 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:21:27,202 INFO ]: ChcToBoogie initialized [2018-06-22 12:21:27,205 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,260 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27 Unit [2018-06-22 12:21:27,260 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:21:27,261 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:21:27,261 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:21:27,261 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:21:27,284 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,284 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,293 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,293 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,297 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,298 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,299 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (1/1) ... [2018-06-22 12:21:27,301 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:21:27,302 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:21:27,302 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:21:27,302 INFO ]: RCFGBuilder initialized [2018-06-22 12:21:27,303 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (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 12:21:27,316 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:21:27,316 INFO ]: Found specification of procedure False [2018-06-22 12:21:27,316 INFO ]: Found implementation of procedure False [2018-06-22 12:21:27,316 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:21:27,316 INFO ]: Found specification of procedure invariant [2018-06-22 12:21:27,316 INFO ]: Found implementation of procedure invariant [2018-06-22 12:21:27,316 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:21:27,316 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:21:27,316 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 12:21:27,545 INFO ]: Using library mode [2018-06-22 12:21:27,545 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:21:27 BoogieIcfgContainer [2018-06-22 12:21:27,545 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:21:27,547 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:21:27,547 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:21:27,556 INFO ]: TraceAbstraction initialized [2018-06-22 12:21:27,556 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:21:27" (1/3) ... [2018-06-22 12:21:27,557 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8709ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:21:27, skipping insertion in model container [2018-06-22 12:21:27,557 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:21:27" (2/3) ... [2018-06-22 12:21:27,558 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8709ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:21:27, skipping insertion in model container [2018-06-22 12:21:27,558 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:21:27" (3/3) ... [2018-06-22 12:21:27,559 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:21:27,579 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:21:27,590 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:21:27,635 INFO ]: Using default assertion order modulation [2018-06-22 12:21:27,636 INFO ]: Interprodecural is true [2018-06-22 12:21:27,636 INFO ]: Hoare is false [2018-06-22 12:21:27,636 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:21:27,636 INFO ]: Backedges is TWOTRACK [2018-06-22 12:21:27,636 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:21:27,636 INFO ]: Difference is false [2018-06-22 12:21:27,636 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:21:27,636 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:21:27,649 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:21:27,660 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:21:27,660 INFO ]: Found error trace [2018-06-22 12:21:27,661 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:27,661 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:27,665 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 12:21:27,667 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:27,667 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:27,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:27,703 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:21:27,703 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:27,752 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:27,852 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:21:27,854 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:21:27,854 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:21:27,855 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:21:27,865 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:21:27,866 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:21:27,867 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:21:27,934 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:21:27,934 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:21:27,942 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:21:27,944 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:21:27,944 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:21:27,957 INFO ]: With dead ends: 13 [2018-06-22 12:21:27,957 INFO ]: Without dead ends: 13 [2018-06-22 12:21:27,959 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 12:21:27,971 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:21:27,991 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:21:27,992 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:21:27,993 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:21:27,995 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:21:27,995 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:21:27,995 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:21:27,995 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:21:27,995 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:21:27,997 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:21:27,997 INFO ]: Found error trace [2018-06-22 12:21:27,997 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:27,997 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:27,997 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 12:21:27,997 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:27,997 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:27,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:27,999 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:21:27,999 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:28,062 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:28,362 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:21:28,363 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:21:28,363 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 12:21:28,371 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:21:28,430 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:28,443 INFO ]: Computing forward predicates... [2018-06-22 12:21:29,286 WARN ]: Spent 490.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2018-06-22 12:21:29,447 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:21:29,468 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:21:29,468 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 12:21:29,468 INFO ]: Interpolant automaton has 9 states [2018-06-22 12:21:29,468 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 12:21:29,468 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:21:29,468 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 12:21:29,771 WARN ]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 12:21:29,793 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:21:29,793 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 12:21:29,793 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:21:29,794 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 12:21:29,794 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:21:29,794 INFO ]: With dead ends: 15 [2018-06-22 12:21:29,794 INFO ]: Without dead ends: 15 [2018-06-22 12:21:29,795 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:21:29,795 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:21:29,798 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:21:29,798 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:21:29,798 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 12:21:29,799 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 12:21:29,799 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:21:29,799 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 12:21:29,799 INFO ]: Interpolant automaton has 9 states. [2018-06-22 12:21:29,799 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 12:21:29,799 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:21:29,799 INFO ]: Found error trace [2018-06-22 12:21:29,799 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:29,799 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:29,800 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 12:21:29,800 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:29,800 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:29,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:29,800 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:21:29,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:29,882 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:30,292 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-22 12:21:30,557 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-06-22 12:21:30,648 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:21:30,649 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:21:30,649 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 12:21:30,662 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:21:30,735 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:21:30,735 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:30,741 INFO ]: Computing forward predicates... [2018-06-22 12:21:31,098 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2018-06-22 12:21:31,477 WARN ]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2018-06-22 12:21:32,400 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2018-06-22 12:21:32,711 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:21:32,746 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:21:32,746 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 12:21:32,747 INFO ]: Interpolant automaton has 13 states [2018-06-22 12:21:32,747 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 12:21:32,747 INFO ]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-06-22 12:21:32,748 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 12:21:33,595 WARN ]: Spent 734.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2018-06-22 12:21:33,824 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-06-22 12:21:33,849 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:21:33,849 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 12:21:33,853 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:21:33,853 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 12:21:33,853 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:21:33,854 INFO ]: With dead ends: 17 [2018-06-22 12:21:33,854 INFO ]: Without dead ends: 17 [2018-06-22 12:21:33,854 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-22 12:21:33,854 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 12:21:33,857 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 12:21:33,857 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 12:21:33,857 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 12:21:33,857 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 12:21:33,858 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:21:33,858 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 12:21:33,858 INFO ]: Interpolant automaton has 13 states. [2018-06-22 12:21:33,858 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 12:21:33,858 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:21:33,858 INFO ]: Found error trace [2018-06-22 12:21:33,858 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:33,859 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:33,859 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 12:21:33,859 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:33,859 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:33,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:33,860 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:21:33,860 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:33,955 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:34,500 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-22 12:21:34,818 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-06-22 12:21:35,110 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:21:35,110 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:21:35,110 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 12:21:35,115 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:21:35,214 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 12:21:35,214 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:35,227 INFO ]: Computing forward predicates... [2018-06-22 12:21:36,407 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2018-06-22 12:21:37,091 WARN ]: Spent 603.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2018-06-22 12:21:37,629 WARN ]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-06-22 12:21:38,643 WARN ]: Spent 683.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2018-06-22 12:21:41,076 WARN ]: Spent 1.84 s on a formula simplification. DAG size of input: 154 DAG size of output: 88 [2018-06-22 12:21:41,479 INFO ]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:21:41,499 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:21:41,499 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 12:21:41,499 INFO ]: Interpolant automaton has 17 states [2018-06-22 12:21:41,500 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 12:21:41,500 INFO ]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-06-22 12:21:41,500 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 12:21:42,727 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 173 DAG size of output: 136 [2018-06-22 12:21:44,966 WARN ]: Spent 2.20 s on a formula simplification. DAG size of input: 203 DAG size of output: 178 [2018-06-22 12:21:45,312 WARN ]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2018-06-22 12:21:45,356 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:21:45,356 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 12:21:45,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:21:45,357 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 12:21:45,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:21:45,358 INFO ]: With dead ends: 19 [2018-06-22 12:21:45,358 INFO ]: Without dead ends: 19 [2018-06-22 12:21:45,358 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-06-22 12:21:45,358 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 12:21:45,360 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 12:21:45,360 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 12:21:45,362 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 12:21:45,362 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 12:21:45,362 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:21:45,362 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 12:21:45,362 INFO ]: Interpolant automaton has 17 states. [2018-06-22 12:21:45,362 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 12:21:45,363 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 12:21:45,363 INFO ]: Found error trace [2018-06-22 12:21:45,363 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:45,363 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:45,363 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 12:21:45,363 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:45,364 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:45,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:45,364 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:21:45,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:45,494 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:46,325 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-06-22 12:21:46,645 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2018-06-22 12:21:46,963 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2018-06-22 12:21:47,275 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2018-06-22 12:21:47,520 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 22 [2018-06-22 12:21:47,683 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 12:21:47,683 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:21:47,683 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 12:21:47,688 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 12:21:47,768 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 12:21:47,768 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:21:47,780 INFO ]: Computing forward predicates... [2018-06-22 12:21:48,181 WARN ]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2018-06-22 12:21:48,819 WARN ]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2018-06-22 12:21:49,223 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-06-22 12:21:50,826 WARN ]: Spent 769.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2018-06-22 12:21:53,067 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 163 DAG size of output: 106 [2018-06-22 12:21:53,732 INFO ]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 12:21:53,752 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:21:53,752 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 12:21:53,752 INFO ]: Interpolant automaton has 20 states [2018-06-22 12:21:53,752 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 12:21:53,752 INFO ]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-06-22 12:21:53,752 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 12:21:54,603 WARN ]: Spent 669.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 135 [2018-06-22 12:21:55,908 WARN ]: Spent 1.25 s on a formula simplification. DAG size of input: 189 DAG size of output: 149 [2018-06-22 12:21:57,796 WARN ]: Spent 1.82 s on a formula simplification. DAG size of input: 209 DAG size of output: 189 [2018-06-22 12:21:58,415 WARN ]: Spent 537.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 140 [2018-06-22 12:21:58,687 WARN ]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-06-22 12:21:58,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:21:58,771 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 12:21:58,772 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 12:21:58,772 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 12:21:58,772 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:21:58,772 INFO ]: With dead ends: 23 [2018-06-22 12:21:58,772 INFO ]: Without dead ends: 23 [2018-06-22 12:21:58,773 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2018-06-22 12:21:58,773 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 12:21:58,776 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 12:21:58,776 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 12:21:58,777 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 12:21:58,777 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 12:21:58,777 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:21:58,777 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 12:21:58,777 INFO ]: Interpolant automaton has 20 states. [2018-06-22 12:21:58,777 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 12:21:58,778 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 12:21:58,778 INFO ]: Found error trace [2018-06-22 12:21:58,778 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:21:58,778 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:21:58,778 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 5 times [2018-06-22 12:21:58,778 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:21:58,778 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:21:58,779 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:58,779 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:21:58,779 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:21:59,196 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:22:01,835 WARN ]: Spent 1.68 s on a formula simplification. DAG size of input: 103 DAG size of output: 56 [2018-06-22 12:22:02,853 WARN ]: Spent 846.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 112 [2018-06-22 12:22:03,876 WARN ]: Spent 989.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 111 [2018-06-22 12:22:05,102 WARN ]: Spent 1.19 s on a formula simplification. DAG size of input: 216 DAG size of output: 143 [2018-06-22 12:22:06,560 WARN ]: Spent 1.41 s on a formula simplification. DAG size of input: 225 DAG size of output: 155 [2018-06-22 12:22:07,860 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 217 DAG size of output: 123 [2018-06-22 12:22:08,437 WARN ]: Spent 412.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 65 [2018-06-22 12:22:09,266 WARN ]: Spent 727.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 70 [2018-06-22 12:22:10,110 WARN ]: Spent 758.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 81 [2018-06-22 12:22:10,878 WARN ]: Spent 696.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 75 [2018-06-22 12:22:11,301 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 43 [2018-06-22 12:22:11,399 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 12:22:11,399 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:22:11,399 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 12:22:11,418 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 12:22:11,552 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 12:22:11,552 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:22:11,566 INFO ]: Computing forward predicates... [2018-06-22 12:22:11,862 WARN ]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-06-22 12:22:12,105 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-06-22 12:22:12,449 WARN ]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2018-06-22 12:22:13,288 WARN ]: Spent 469.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2018-06-22 12:22:13,668 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2018-06-22 12:22:16,181 WARN ]: Spent 2.01 s on a formula simplification. DAG size of input: 173 DAG size of output: 100 [2018-06-22 12:22:19,165 WARN ]: Spent 2.12 s on a formula simplification. DAG size of input: 216 DAG size of output: 125 [2018-06-22 12:22:23,903 WARN ]: Spent 2.93 s on a formula simplification. DAG size of input: 256 DAG size of output: 152 [2018-06-22 12:22:27,118 WARN ]: Spent 2.14 s on a formula simplification. DAG size of input: 389 DAG size of output: 77 [2018-06-22 12:22:27,236 INFO ]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 12:22:27,256 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:22:27,256 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-06-22 12:22:27,257 INFO ]: Interpolant automaton has 28 states [2018-06-22 12:22:27,257 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 12:22:27,257 INFO ]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2018-06-22 12:22:27,257 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 12:22:28,538 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 269 DAG size of output: 145 Received shutdown request... [2018-06-22 12:22:29,319 WARN ]: Removed 14 from assertion stack [2018-06-22 12:22:29,319 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 12:22:29,319 WARN ]: Verification canceled [2018-06-22 12:22:29,323 WARN ]: Timeout [2018-06-22 12:22:29,323 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:22:29 BoogieIcfgContainer [2018-06-22 12:22:29,323 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:22:29,324 INFO ]: Toolchain (without parser) took 62128.89 ms. Allocated memory was 306.7 MB in the beginning and 817.9 MB in the end (delta: 511.2 MB). Free memory was 260.1 MB in the beginning and 495.9 MB in the end (delta: -235.8 MB). Peak memory consumption was 275.4 MB. Max. memory is 3.6 GB. [2018-06-22 12:22:29,325 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:22:29,325 INFO ]: ChcToBoogie took 58.17 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:22:29,325 INFO ]: Boogie Preprocessor took 40.50 ms. Allocated memory is still 306.7 MB. Free memory was 257.1 MB in the beginning and 256.1 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 3.6 GB. [2018-06-22 12:22:29,325 INFO ]: RCFGBuilder took 243.64 ms. Allocated memory is still 306.7 MB. Free memory was 256.1 MB in the beginning and 244.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:22:29,326 INFO ]: TraceAbstraction took 61776.33 ms. Allocated memory was 306.7 MB in the beginning and 817.9 MB in the end (delta: 511.2 MB). Free memory was 244.1 MB in the beginning and 495.9 MB in the end (delta: -251.8 MB). Peak memory consumption was 259.4 MB. Max. memory is 3.6 GB. [2018-06-22 12:22:29,328 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 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.17 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.50 ms. Allocated memory is still 306.7 MB. Free memory was 257.1 MB in the beginning and 256.1 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 3.6 GB. * RCFGBuilder took 243.64 ms. Allocated memory is still 306.7 MB. Free memory was 256.1 MB in the beginning and 244.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61776.33 ms. Allocated memory was 306.7 MB in the beginning and 817.9 MB in the end (delta: 511.2 MB). Free memory was 244.1 MB in the beginning and 495.9 MB in the end (delta: -251.8 MB). Peak memory consumption was 259.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (23states) and interpolant automaton (currently 5 states, 28 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 344. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.6s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 12.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 47 SDslu, 292 SDs, 0 SdLazy, 263 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 48.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 47.5s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 803928 SizeOfPredicates, 441 NumberOfNonLiveVariables, 1147 ConjunctsInSsa, 408 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 107/296 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/eventclock6.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-22-29-338.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/eventclock6.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-22-29-338.csv Completed graceful shutdown