java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:12:08,072 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:12:08,074 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:12:08,087 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:12:08,087 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:12:08,089 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:12:08,091 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:12:08,095 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:12:08,096 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:12:08,098 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:12:08,099 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:12:08,099 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:12:08,100 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:12:08,101 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:12:08,102 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:12:08,102 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:12:08,107 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:12:08,115 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:12:08,117 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:12:08,118 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:12:08,122 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:12:08,124 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:12:08,124 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:12:08,124 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:12:08,125 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:12:08,126 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:12:08,127 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:12:08,128 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:12:08,129 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:12:08,129 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:12:08,129 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:12:08,130 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:12:08,130 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:12:08,131 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:12:08,131 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:12:08,132 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:12:08,145 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:12:08,145 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:12:08,146 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:12:08,146 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:12:08,147 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:12:08,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:12:08,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:12:08,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:12:08,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:12:08,148 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:12:08,148 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:12:08,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:12:08,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:12:08,149 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:12:08,149 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:12:08,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:12:08,149 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:12:08,151 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:12:08,151 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:12:08,207 INFO ]: Repository-Root is: /tmp [2018-06-22 05:12:08,233 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:12:08,240 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:12:08,242 INFO ]: Initializing SmtParser... [2018-06-22 05:12:08,242 INFO ]: SmtParser initialized [2018-06-22 05:12:08,243 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 [2018-06-22 05:12:08,244 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:12:08,342 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 unknown [2018-06-22 05:12:08,840 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/cars.c.smt2 [2018-06-22 05:12:08,845 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:12:08,851 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:12:08,851 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:12:08,851 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:12:08,852 INFO ]: ChcToBoogie initialized [2018-06-22 05:12:08,855 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,934 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08 Unit [2018-06-22 05:12:08,934 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:12:08,935 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:12:08,935 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:12:08,935 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:12:08,955 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,956 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,979 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,980 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,998 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:08,999 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:09,011 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (1/1) ... [2018-06-22 05:12:09,015 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:12:09,016 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:12:09,016 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:12:09,016 INFO ]: RCFGBuilder initialized [2018-06-22 05:12:09,017 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (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 05:12:09,048 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:12:09,048 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:12:09,048 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:12:09,048 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:12:09,048 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:12:09,048 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 05:12:09,437 INFO ]: Using library mode [2018-06-22 05:12:09,438 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:12:09 BoogieIcfgContainer [2018-06-22 05:12:09,438 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:12:09,442 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:12:09,442 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:12:09,448 INFO ]: TraceAbstraction initialized [2018-06-22 05:12:09,448 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:12:08" (1/3) ... [2018-06-22 05:12:09,449 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16de9144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:12:09, skipping insertion in model container [2018-06-22 05:12:09,449 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:12:08" (2/3) ... [2018-06-22 05:12:09,450 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16de9144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:12:09, skipping insertion in model container [2018-06-22 05:12:09,450 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:12:09" (3/3) ... [2018-06-22 05:12:09,453 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:12:09,464 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:12:09,478 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:12:09,537 INFO ]: Using default assertion order modulation [2018-06-22 05:12:09,538 INFO ]: Interprodecural is true [2018-06-22 05:12:09,538 INFO ]: Hoare is false [2018-06-22 05:12:09,538 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:12:09,538 INFO ]: Backedges is TWOTRACK [2018-06-22 05:12:09,538 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:12:09,538 INFO ]: Difference is false [2018-06-22 05:12:09,538 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:12:09,538 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:12:09,556 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:12:09,572 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:12:09,572 INFO ]: Found error trace [2018-06-22 05:12:09,573 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:09,573 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:09,580 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:12:09,582 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:09,583 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:09,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:09,632 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:12:09,633 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:09,690 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:09,843 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:09,844 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:12:09,844 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:12:09,846 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:12:09,857 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:12:09,857 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:12:09,860 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:12:09,944 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:12:09,944 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:12:09,944 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:12:09,946 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:12:09,946 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:12:09,959 INFO ]: With dead ends: 9 [2018-06-22 05:12:09,959 INFO ]: Without dead ends: 9 [2018-06-22 05:12:09,961 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:12:09,981 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:12:10,000 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:12:10,001 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:12:10,002 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:12:10,004 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:12:10,004 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:12:10,004 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:12:10,004 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:12:10,005 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:12:10,005 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:12:10,005 INFO ]: Found error trace [2018-06-22 05:12:10,005 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:10,005 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:10,005 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:12:10,005 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:10,005 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:10,006 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:10,006 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:12:10,006 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:10,100 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:10,360 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:10,360 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:12:10,360 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:10,393 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:12:10,494 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:10,507 INFO ]: Computing forward predicates... [2018-06-22 05:12:10,863 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:12:11,462 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:11,496 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:12:11,496 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:12:11,497 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:12:11,497 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:12:11,497 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:12:11,497 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:12:11,896 WARN ]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:12:11,989 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:12:11,990 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:12:11,990 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:12:11,990 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:12:11,991 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:12:11,991 INFO ]: With dead ends: 10 [2018-06-22 05:12:11,991 INFO ]: Without dead ends: 10 [2018-06-22 05:12:11,992 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:12:11,992 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:12:11,993 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:12:11,993 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:12:11,993 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:12:11,993 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:12:11,993 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:12:11,994 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:12:11,994 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:12:11,994 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:12:11,994 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:12:11,994 INFO ]: Found error trace [2018-06-22 05:12:11,994 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:11,994 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:11,994 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:12:11,994 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:11,994 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:11,997 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:11,997 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:12:11,997 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:12,110 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:12,433 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:12,434 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:12:12,434 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:12,444 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:12:12,555 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:12:12,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:12,560 INFO ]: Computing forward predicates... [2018-06-22 05:12:13,036 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 6 [2018-06-22 05:12:18,424 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:18,454 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:12:18,454 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:12:18,455 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:12:18,455 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:12:18,455 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:12:18,455 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:12:18,600 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:12:18,600 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:12:18,600 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:12:18,600 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:12:18,600 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:12:18,600 INFO ]: With dead ends: 11 [2018-06-22 05:12:18,600 INFO ]: Without dead ends: 11 [2018-06-22 05:12:18,601 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:12:18,601 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:12:18,601 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:12:18,602 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:12:18,602 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:12:18,602 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:12:18,602 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:12:18,602 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:12:18,602 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:12:18,602 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:12:18,602 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:12:18,602 INFO ]: Found error trace [2018-06-22 05:12:18,602 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:18,602 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:18,602 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:12:18,602 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:18,602 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:18,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:18,605 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:12:18,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:18,705 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:19,018 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:19,018 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:12:19,018 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:19,026 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:12:19,127 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:12:19,127 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:19,131 INFO ]: Computing forward predicates... [2018-06-22 05:12:19,546 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:19,581 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:12:19,581 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:12:19,582 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:12:19,582 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:12:19,582 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:12:19,582 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:12:19,989 WARN ]: Spent 342.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-06-22 05:12:20,185 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:12:20,185 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:12:20,185 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:12:20,185 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:12:20,185 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:12:20,186 INFO ]: With dead ends: 12 [2018-06-22 05:12:20,186 INFO ]: Without dead ends: 12 [2018-06-22 05:12:20,186 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:12:20,186 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:12:20,188 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:12:20,188 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:12:20,188 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:12:20,188 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:12:20,188 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:12:20,188 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:12:20,188 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:12:20,188 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:12:20,189 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:12:20,189 INFO ]: Found error trace [2018-06-22 05:12:20,189 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:20,189 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:20,189 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:12:20,189 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:20,189 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:20,192 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:20,192 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:12:20,193 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:20,265 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:20,499 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:20,499 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:12:20,499 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:20,518 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:12:20,632 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:12:20,632 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:20,636 INFO ]: Computing forward predicates... [2018-06-22 05:12:20,943 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:12:23,370 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:23,393 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:12:23,393 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:12:23,393 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:12:23,393 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:12:23,393 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:12:23,394 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:12:23,720 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:12:23,720 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:12:23,740 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:12:23,740 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:12:23,740 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:12:23,740 INFO ]: With dead ends: 13 [2018-06-22 05:12:23,740 INFO ]: Without dead ends: 13 [2018-06-22 05:12:23,741 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:12:23,741 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:12:23,742 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:12:23,742 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:12:23,743 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:12:23,743 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:12:23,743 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:12:23,743 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:12:23,743 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:12:23,743 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:12:23,743 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:12:23,743 INFO ]: Found error trace [2018-06-22 05:12:23,743 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:12:23,743 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:12:23,744 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:12:23,744 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:12:23,744 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:12:23,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:23,745 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:12:23,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:12:23,861 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:24,109 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:12:24,109 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:12:24,109 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:12:24,119 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:12:24,244 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:12:24,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:12:24,249 INFO ]: Computing forward predicates... [2018-06-22 05:12:29,932 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:12:30,315 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:12:30,326 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:12:30,383 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:12:30,393 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown