java -Xss4m -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/fragtest_simple.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:01:16,791 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:01:16,794 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:01:16,806 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:01:16,806 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:01:16,807 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:01:16,808 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:01:16,812 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:01:16,813 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:01:16,814 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:01:16,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:01:16,816 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:01:16,817 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:01:16,818 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:01:16,819 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:01:16,819 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:01:16,822 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:01:16,824 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:01:16,834 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:01:16,835 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:01:16,836 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:01:16,838 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:01:16,838 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:01:16,838 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:01:16,842 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:01:16,843 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:01:16,844 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:01:16,844 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:01:16,845 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:01:16,845 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:01:16,849 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:01:16,850 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:01:16,850 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:01:16,850 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:01:16,851 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:01:16,851 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:01:16,874 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:01:16,874 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:01:16,875 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:01:16,875 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:01:16,877 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:01:16,877 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:01:16,878 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:01:16,878 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:01:16,878 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:01:16,878 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:01:16,878 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:01:16,878 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:01:16,879 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:01:16,879 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:01:16,879 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:01:16,879 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:01:16,879 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:01:16,879 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:01:16,880 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:01:16,880 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:01:16,880 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:01:16,884 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:01:16,884 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:01:16,931 INFO ]: Repository-Root is: /tmp [2018-06-25 13:01:16,946 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:01:16,951 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:01:16,952 INFO ]: Initializing SmtParser... [2018-06-25 13:01:16,953 INFO ]: SmtParser initialized [2018-06-25 13:01:16,953 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/fragtest_simple.c.smt2 [2018-06-25 13:01:16,955 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 [2018-06-25 13:01:17,043 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/fragtest_simple.c.smt2 unknown [2018-06-25 13:01:17,373 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/fragtest_simple.c.smt2 [2018-06-25 13:01:17,378 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:01:17,389 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:01:17,390 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:01:17,390 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:01:17,390 INFO ]: ChcToBoogie initialized [2018-06-25 13:01:17,393 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,448 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17 Unit [2018-06-25 13:01:17,448 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:01:17,449 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:01:17,449 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:01:17,449 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:01:17,468 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,468 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,475 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,475 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,492 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,493 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,495 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (1/1) ... [2018-06-25 13:01:17,506 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:01:17,506 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:01:17,506 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:01:17,506 INFO ]: RCFGBuilder initialized [2018-06-25 13:01:17,507 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (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) [2018-06-25 13:01:17,519 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:01:17,519 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:01:17,519 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:01:17,519 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:01:17,519 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:01:17,519 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 [2018-06-25 13:01:17,803 INFO ]: Using library mode [2018-06-25 13:01:17,803 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:01:17 BoogieIcfgContainer [2018-06-25 13:01:17,803 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:01:17,805 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:01:17,805 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:01:17,808 INFO ]: TraceAbstraction initialized [2018-06-25 13:01:17,808 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:01:17" (1/3) ... [2018-06-25 13:01:17,809 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d725ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:01:17, skipping insertion in model container [2018-06-25 13:01:17,809 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:01:17" (2/3) ... [2018-06-25 13:01:17,809 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d725ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:01:17, skipping insertion in model container [2018-06-25 13:01:17,809 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:01:17" (3/3) ... [2018-06-25 13:01:17,811 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:01:17,820 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:01:17,838 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:01:17,881 INFO ]: Using default assertion order modulation [2018-06-25 13:01:17,881 INFO ]: Interprodecural is true [2018-06-25 13:01:17,881 INFO ]: Hoare is false [2018-06-25 13:01:17,881 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:01:17,882 INFO ]: Backedges is TWOTRACK [2018-06-25 13:01:17,882 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:01:17,882 INFO ]: Difference is false [2018-06-25 13:01:17,882 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:01:17,882 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:01:17,893 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:01:17,910 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:01:17,910 INFO ]: Found error trace [2018-06-25 13:01:17,911 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:01:17,911 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:01:17,917 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:01:17,919 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:01:17,920 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:01:17,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:17,955 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:01:17,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:17,997 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:18,086 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:18,088 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:01:18,088 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:01:18,089 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:01:18,102 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:01:18,103 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:01:18,105 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:01:18,152 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:01:18,152 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:01:18,153 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:01:18,154 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:01:18,154 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:01:18,162 INFO ]: With dead ends: 9 [2018-06-25 13:01:18,162 INFO ]: Without dead ends: 9 [2018-06-25 13:01:18,163 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 [2018-06-25 13:01:18,177 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:01:18,206 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:01:18,207 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:01:18,207 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:01:18,208 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:01:18,208 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:01:18,208 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:01:18,208 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:01:18,209 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:01:18,209 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:01:18,209 INFO ]: Found error trace [2018-06-25 13:01:18,209 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:01:18,209 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:01:18,209 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:01:18,209 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:01:18,209 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:01:18,210 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:18,210 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:01:18,210 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:18,291 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:18,431 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:18,431 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:01:18,431 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 [2018-06-25 13:01:18,439 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:01:18,495 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:18,505 INFO ]: Computing forward predicates... [2018-06-25 13:01:18,950 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:18,971 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:01:18,971 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:01:18,971 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:01:18,972 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:01:18,972 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:01:18,972 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:01:19,051 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:01:19,052 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:01:19,052 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:01:19,052 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:01:19,053 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:01:19,053 INFO ]: With dead ends: 11 [2018-06-25 13:01:19,053 INFO ]: Without dead ends: 11 [2018-06-25 13:01:19,054 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:01:19,054 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:01:19,055 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:01:19,055 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:01:19,056 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:01:19,057 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 13:01:19,057 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:01:19,057 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:01:19,057 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:01:19,057 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:01:19,058 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:01:19,058 INFO ]: Found error trace [2018-06-25 13:01:19,058 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:01:19,058 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:01:19,058 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 13:01:19,058 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:01:19,058 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:01:19,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:19,059 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:01:19,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:19,177 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:19,543 WARN ]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 13:01:19,579 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:19,579 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:01:19,579 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 [2018-06-25 13:01:19,588 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:01:19,655 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:01:19,655 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:19,661 INFO ]: Computing forward predicates... [2018-06-25 13:01:23,065 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:23,085 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:01:23,085 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:01:23,085 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:01:23,085 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:01:23,085 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:01:23,085 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:01:23,231 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:01:23,231 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:01:23,231 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:01:23,231 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:01:23,231 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:01:23,231 INFO ]: With dead ends: 13 [2018-06-25 13:01:23,231 INFO ]: Without dead ends: 13 [2018-06-25 13:01:23,232 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:01:23,232 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:01:23,233 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:01:23,233 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:01:23,234 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:01:23,234 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 13:01:23,234 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:01:23,234 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:01:23,234 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:01:23,234 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:01:23,234 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:01:23,234 INFO ]: Found error trace [2018-06-25 13:01:23,234 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:01:23,235 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:01:23,235 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-25 13:01:23,235 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:01:23,235 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:01:23,236 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:23,236 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:01:23,236 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:01:23,308 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:23,542 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:01:23,542 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:01:23,542 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 [2018-06-25 13:01:23,550 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:01:23,655 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 13:01:23,655 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:01:23,661 INFO ]: Computing forward predicates... [2018-06-25 13:01:28,881 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:01:29,036 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:00,017 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 14 [2018-06-25 13:02:09,030 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,038 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:02:09,059 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,065 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,181 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,207 WARN ]: expecting exponential blowup for input size 9 [2018-06-25 13:02:09,372 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,378 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,392 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:02:09,419 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:02:09,442 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,448 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:02:09,463 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,471 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,476 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,493 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,625 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:02:09,636 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:02:23,569 INFO ]: Timeout while computing interpolants [2018-06-25 13:02:23,770 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:02:23,770 WARN ]: Verification canceled [2018-06-25 13:02:23,774 WARN ]: Timeout [2018-06-25 13:02:23,774 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:02:23 BoogieIcfgContainer [2018-06-25 13:02:23,774 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:02:23,775 INFO ]: Toolchain (without parser) took 66396.85 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 257.6 MB in the beginning and 1.0 GB in the end (delta: -759.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:02:23,777 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:02:23,777 INFO ]: ChcToBoogie took 58.77 ms. Allocated memory is still 307.2 MB. Free memory was 255.6 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:02:23,778 INFO ]: Boogie Preprocessor took 57.33 ms. Allocated memory is still 307.2 MB. Free memory is still 253.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:02:23,778 INFO ]: RCFGBuilder took 297.15 ms. Allocated memory is still 307.2 MB. Free memory was 253.6 MB in the beginning and 241.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:02:23,779 INFO ]: TraceAbstraction took 65969.37 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 239.7 MB in the beginning and 1.0 GB in the end (delta: -776.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:02:23,782 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.77 ms. Allocated memory is still 307.2 MB. Free memory was 255.6 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 57.33 ms. Allocated memory is still 307.2 MB. Free memory is still 253.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 297.15 ms. Allocated memory is still 307.2 MB. Free memory was 253.6 MB in the beginning and 241.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65969.37 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 239.7 MB in the beginning and 1.0 GB in the end (delta: -776.9 MB). Peak memory consumption was 1.4 GB. 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 analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 9253 quantified variables from 12 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.9s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 38 SDs, 0 SdLazy, 18 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 902 SizeOfPredicates, 10 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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/fragtest_simple.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-02-23-798.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-02-23-798.csv Completed graceful shutdown