/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:51:03,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:51:03,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:51:03,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 17:51:03,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:51:03,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:51:03,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:51:03,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:51:03,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:51:03,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:51:03,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:51:03,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:51:03,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:51:03,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:51:03,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:51:03,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:51:04,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:51:04,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:51:04,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:51:04,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:51:04,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:51:04,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:51:04,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:51:04,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:51:04,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:51:04,036 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:51:04,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:51:04,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:51:04,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:51:04,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:51:04,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:51:04,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:51:04,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:51:04,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:51:04,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:51:04,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:51:04,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:51:04,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:51:04,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:51:04,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:51:04,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:51:04,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:51:04,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:51:04,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:51:04,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:51:04,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:51:04,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:51:04,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:51:04,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:51:04,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:51:04,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:51:04,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:51:04,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:51:04,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:51:04,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:51:04,418 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:51:04,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-18 17:51:04,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af5569156/82442a89e11c46e8b3249218cfa5f269/FLAG3131833d8 [2020-08-18 17:51:04,968 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:51:04,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-18 17:51:04,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af5569156/82442a89e11c46e8b3249218cfa5f269/FLAG3131833d8 [2020-08-18 17:51:05,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af5569156/82442a89e11c46e8b3249218cfa5f269 [2020-08-18 17:51:05,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:51:05,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:51:05,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:51:05,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:51:05,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:51:05,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177c5926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05, skipping insertion in model container [2020-08-18 17:51:05,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:51:05,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:51:05,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:51:05,673 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:51:05,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:51:05,706 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:51:05,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05 WrapperNode [2020-08-18 17:51:05,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:51:05,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:51:05,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:51:05,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:51:05,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... [2020-08-18 17:51:05,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:51:05,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:51:05,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:51:05,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:51:05,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:51:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:51:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:51:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-08-18 17:51:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:51:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:51:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:51:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-08-18 17:51:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:51:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:51:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:51:06,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:51:06,089 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:51:06,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:51:06 BoogieIcfgContainer [2020-08-18 17:51:06,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:51:06,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:51:06,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:51:06,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:51:06,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:51:05" (1/3) ... [2020-08-18 17:51:06,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73797c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:51:06, skipping insertion in model container [2020-08-18 17:51:06,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:51:05" (2/3) ... [2020-08-18 17:51:06,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73797c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:51:06, skipping insertion in model container [2020-08-18 17:51:06,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:51:06" (3/3) ... [2020-08-18 17:51:06,102 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-08-18 17:51:06,113 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:51:06,120 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:51:06,134 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:51:06,169 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:51:06,169 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:51:06,169 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:51:06,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:51:06,169 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:51:06,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:51:06,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:51:06,170 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:51:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-18 17:51:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 17:51:06,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:06,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:06,196 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-08-18 17:51:06,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:06,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493081387] [2020-08-18 17:51:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:51:06,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493081387] [2020-08-18 17:51:06,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:06,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:51:06,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490798422] [2020-08-18 17:51:06,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:51:06,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:06,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:51:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:51:06,522 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-18 17:51:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:06,683 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 17:51:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:51:06,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-18 17:51:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:06,698 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:51:06,699 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 17:51:06,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:51:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 17:51:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 17:51:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:51:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-18 17:51:06,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-08-18 17:51:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:06,750 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-18 17:51:06,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:51:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-18 17:51:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:51:06,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:06,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:06,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:51:06,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-08-18 17:51:06,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:06,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869081377] [2020-08-18 17:51:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:51:06,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869081377] [2020-08-18 17:51:06,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:06,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:51:06,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799197599] [2020-08-18 17:51:06,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:51:06,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:51:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:51:06,899 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2020-08-18 17:51:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:07,002 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-08-18 17:51:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:51:07,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-08-18 17:51:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:07,005 INFO L225 Difference]: With dead ends: 30 [2020-08-18 17:51:07,005 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 17:51:07,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 17:51:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 17:51:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:51:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-08-18 17:51:07,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-08-18 17:51:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:07,016 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-08-18 17:51:07,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:51:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-08-18 17:51:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:51:07,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:07,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:07,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:51:07,019 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:07,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-08-18 17:51:07,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:07,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686772318] [2020-08-18 17:51:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:51:07,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686772318] [2020-08-18 17:51:07,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:07,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:51:07,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892301035] [2020-08-18 17:51:07,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:51:07,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:51:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:51:07,188 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2020-08-18 17:51:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:07,335 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-08-18 17:51:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:51:07,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-08-18 17:51:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:07,338 INFO L225 Difference]: With dead ends: 36 [2020-08-18 17:51:07,338 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 17:51:07,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 17:51:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 17:51:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 17:51:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-08-18 17:51:07,349 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-08-18 17:51:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:07,349 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-08-18 17:51:07,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:51:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-08-18 17:51:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:51:07,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:07,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:07,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:51:07,367 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-08-18 17:51:07,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:07,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299502330] [2020-08-18 17:51:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 17:51:07,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299502330] [2020-08-18 17:51:07,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:07,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:51:07,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235456135] [2020-08-18 17:51:07,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:07,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:07,577 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-08-18 17:51:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:07,710 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 17:51:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:51:07,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-08-18 17:51:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:07,713 INFO L225 Difference]: With dead ends: 36 [2020-08-18 17:51:07,713 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 17:51:07,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:51:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 17:51:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 17:51:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:51:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-18 17:51:07,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-08-18 17:51:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:07,723 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-18 17:51:07,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-18 17:51:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:51:07,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:07,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:07,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:51:07,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-08-18 17:51:07,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:07,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739981810] [2020-08-18 17:51:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 17:51:07,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739981810] [2020-08-18 17:51:07,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:07,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:51:07,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086503270] [2020-08-18 17:51:07,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:51:07,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:51:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:51:07,867 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-08-18 17:51:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:07,918 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-18 17:51:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:51:07,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 17:51:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:07,920 INFO L225 Difference]: With dead ends: 31 [2020-08-18 17:51:07,920 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 17:51:07,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:51:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 17:51:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-08-18 17:51:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 17:51:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-18 17:51:07,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-08-18 17:51:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:07,928 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-18 17:51:07,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:51:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-18 17:51:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:51:07,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:07,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:07,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:51:07,930 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-08-18 17:51:07,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933680015] [2020-08-18 17:51:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:51:08,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933680015] [2020-08-18 17:51:08,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:08,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:51:08,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263037453] [2020-08-18 17:51:08,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:08,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:08,020 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-08-18 17:51:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:08,101 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-08-18 17:51:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:51:08,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-18 17:51:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:08,103 INFO L225 Difference]: With dead ends: 34 [2020-08-18 17:51:08,103 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 17:51:08,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:51:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 17:51:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 17:51:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:51:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-08-18 17:51:08,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-08-18 17:51:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:08,111 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-08-18 17:51:08,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-08-18 17:51:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 17:51:08,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:08,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:08,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:51:08,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:08,114 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-08-18 17:51:08,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:08,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844408195] [2020-08-18 17:51:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:51:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 17:51:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 17:51:08,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844408195] [2020-08-18 17:51:08,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:08,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:51:08,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879907003] [2020-08-18 17:51:08,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:08,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:08,260 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-08-18 17:51:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:08,319 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-08-18 17:51:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:51:08,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-08-18 17:51:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:08,320 INFO L225 Difference]: With dead ends: 30 [2020-08-18 17:51:08,320 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:51:08,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:51:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:51:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:51:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:51:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:51:08,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-08-18 17:51:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:08,323 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:51:08,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:51:08,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:51:08,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:51:08,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:51:08,396 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:51:08,397 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:51:08,397 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-08-18 17:51:08,397 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-08-18 17:51:08,397 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-18 17:51:08,398 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-18 17:51:08,398 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-08-18 17:51:08,398 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-08-18 17:51:08,398 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-08-18 17:51:08,398 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 17:51:08,399 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-18 17:51:08,399 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-18 17:51:08,399 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:51:08,399 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:51:08,399 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:51:08,400 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:51:08,400 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-18 17:51:08,400 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-08-18 17:51:08,400 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-08-18 17:51:08,400 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-08-18 17:51:08,401 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 17:51:08,401 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-08-18 17:51:08,401 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-08-18 17:51:08,401 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-08-18 17:51:08,401 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-18 17:51:08,402 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-08-18 17:51:08,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:51:08 BoogieIcfgContainer [2020-08-18 17:51:08,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:51:08,411 INFO L168 Benchmark]: Toolchain (without parser) took 3022.47 ms. Allocated memory was 138.9 MB in the beginning and 232.8 MB in the end (delta: 93.8 MB). Free memory was 102.3 MB in the beginning and 95.8 MB in the end (delta: 6.5 MB). Peak memory consumption was 100.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:51:08,412 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:51:08,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.83 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:51:08,415 INFO L168 Benchmark]: Boogie Preprocessor took 109.82 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:51:08,416 INFO L168 Benchmark]: RCFGBuilder took 275.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.5 MB in the beginning and 166.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:51:08,417 INFO L168 Benchmark]: TraceAbstraction took 2313.90 ms. Allocated memory was 200.8 MB in the beginning and 232.8 MB in the end (delta: 32.0 MB). Free memory was 165.3 MB in the beginning and 95.8 MB in the end (delta: 69.5 MB). Peak memory consumption was 101.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:51:08,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.83 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.82 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.0 MB in the beginning and 179.1 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.5 MB in the beginning and 166.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2313.90 ms. Allocated memory was 200.8 MB in the beginning and 232.8 MB in the end (delta: 32.0 MB). Free memory was 165.3 MB in the beginning and 95.8 MB in the end (delta: 69.5 MB). Peak memory consumption was 101.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 103 SDslu, 517 SDs, 0 SdLazy, 330 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 7192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...